CVE-2019-1020018 (published 2019-07-29T14:15Z)

Discourse before 2.3.0 and 2.4.x before 2.4.0.beta3 lacks a confirmation screen when logging in via an email link.

Severity: HIGH
CVSS v2 base score: 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS v3 base score: 7.3, HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Weakness information:
cwe_id: CWE-287
cwe_name: Improper Authentication
description: When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
extended_description: 
            
			
         
         

Fix information:
repo_url: https://github.com/discourse/discourse
commit_details: repo_url: https://github.com/discourse/discourse
author: David Taylor
author_date: 2019-06-12 15:37:26+01:00
msg: SECURITY: Add confirmation screen when logging in via email link
repository: repo_url: https://github.com/discourse/discourse
repo_name: discourse/discourse
description: A platform for community discussion. Free, open, simple.
repo_language: Ruby
owner: discourse
file_changes: filename: email-login.js.es6
change_type: ModificationType.ADD
diff: @@ -0,0 +1,29 @@
+import { SECOND_FACTOR_METHODS } from "discourse/models/user";
+import { ajax } from "discourse/lib/ajax";
+import DiscourseURL from "discourse/lib/url";
+import { popupAjaxError } from "discourse/lib/ajax-error";
+
+export default Ember.Controller.extend({
+  secondFactorMethod: SECOND_FACTOR_METHODS.TOTP,
+  lockImageUrl: Discourse.getURL("/images/lock.svg"),
+  actions: {
+    finishLogin() {
+      ajax({
+        url: `/session/email-login/${this.model.token}`,
+        type: "POST",
+        data: {
+          second_factor_token: this.secondFactorToken,
+          second_factor_method: this.secondFactorMethod
+        }
+      })
+        .then(result => {
+          if (result.success) {
+            DiscourseURL.redirectTo("/");
+          } else {
+            this.set("model.error", result.error);
+          }
+        })
+        .catch(popupAjaxError);
+    }
+  }
+});

programming_language: TypeScript
filename: app-route-map.js.es6
change_type: ModificationType.MODIFY
diff: @@ -177,6 +177,7 @@ export default function() {
   });
   this.route("signup", { path: "/signup" });
   this.route("login", { path: "/login" });
+  this.route("email-login", { path: "/session/email-login/:token" });
   this.route("login-preferences");
   this.route("forgot-password", { path: "/password-reset" });
   this.route("faq", { path: "/faq" });

programming_language: JavaScript
filename: email-login.js.es6
change_type: ModificationType.ADD
diff: @@ -0,0 +1,11 @@
+import { ajax } from "discourse/lib/ajax";
+
+export default Discourse.Route.extend({
+  titleToken() {
+    return I18n.t("login.title");
+  },
+
+  model(params) {
+    return ajax(`/session/email-login/${params.token}`);
+  }
+});

programming_language: TypeScript
filename: email-login.hbs
change_type: ModificationType.ADD
diff: @@ -0,0 +1,33 @@
+<div class="container email-login clearfix">
+  <div class="pull-left col-image">
+    <img src={{lockImageUrl}} class="password-reset-img">
+  </div>
+
+  <div class="pull-left col-form">
+    <form>
+      {{#if model.error}}
+        <div class='alert alert-error'>
+          {{model.error}}
+        </div>
+      {{/if}}
+
+      {{#if model.can_login}}
+        {{#if model.second_factor_required}}
+          {{#second-factor-form
+            secondFactorMethod=secondFactorMethod
+            secondFactorToken=secondFactorToken
+            backupEnabled=model.backup_codes_enabled
+            isLogin=true}}
+            {{second-factor-input value=secondFactorToken secondFactorMethod=secondFactorMethod backupEnabled=backupEnabled}}
+          {{/second-factor-form}}
+        {{else}}
+          <h2>{{i18n "email_login.confirm_title" site_name=siteSettings.title}}</h2>
+          <p>{{i18n "email_login.logging_in_as" email=model.token_email}}</p>
+        {{/if}}
+
+        {{d-button label="email_login.confirm_button" action=(action "finishLogin") class="btn-primary"}}
+      {{/if}}
+    </form>
+  </div>
+</div>
+

programming_language: HTML
filename: login.scss
change_type: ModificationType.MODIFY
diff: @@ -267,6 +267,7 @@
 }
 
 .password-reset,
+.email-login,
 .invites-show {
   .col-form {
     padding-left: 20px;
@@ -282,7 +283,8 @@
   }
 }
 
-.password-reset {
+.password-reset,
+.email-login {
   .col-form {
     padding-top: 40px;
   }

programming_language: CSS
filename: login.scss
change_type: ModificationType.MODIFY
diff: @@ -182,6 +182,7 @@
 }
 
 .password-reset,
+.email-login,
 .invites-show {
   margin-top: 30px;
   .col-image {

programming_language: CSS
filename: session_controller.rb
change_type: ModificationType.MODIFY
diff: @@ -11,10 +11,10 @@ class SessionController < ApplicationController
     render body: nil, status: 500
   end
 
-  before_action :check_local_login_allowed, only: %i(create forgot_password email_login)
+  before_action :check_local_login_allowed, only: %i(create forgot_password email_login email_login_info)
   before_action :rate_limit_login, only: %i(create email_login)
   skip_before_action :redirect_to_login_if_required
-  skip_before_action :preload_json, :check_xhr, only: %i(sso sso_login sso_provider destroy email_login one_time_password)
+  skip_before_action :preload_json, :check_xhr, only: %i(sso sso_login sso_provider destroy one_time_password)
 
   ACTIVATE_USER_KEY = "activate_user"
 
@@ -305,40 +305,63 @@ class SessionController < ApplicationController
     end
   end
 
+  def email_login_info
+    raise Discourse::NotFound if !SiteSetting.enable_local_logins_via_email
+
+    token = params[:token]
+    matched_token = EmailToken.confirmable(token)
+
+    if matched_token
+      response = {
+        can_login: true,
+        token: token,
+        token_email: matched_token.email
+      }
+
+      if matched_token.user&.totp_enabled?
+        response.merge!(
+          second_factor_required: true,
+          backup_codes_enabled: matched_token.user&.backup_codes_enabled?
+        )
+      end
+
+      render json: response
+    else
+      render json: {
+        can_login: false,
+        error: I18n.t('email_login.invalid_token')
+      }
+    end
+  end
+
   def email_login
     raise Discourse::NotFound if !SiteSetting.enable_local_logins_via_email
     second_factor_token = params[:second_factor_token]
     second_factor_method = params[:second_factor_method].to_i
     token = params[:token]
-    valid_token = !!EmailToken.valid_token_format?(token)
-    user = EmailToken.confirmable(token)&.user
+    matched_token = EmailToken.confirmable(token)
 
-    if valid_token && user&.totp_enabled?
+    if matched_token&.user&.totp_enabled?
       if !second_factor_token.present?
-        @second_factor_required = true
-        @backup_codes_enabled = true if user&.backup_codes_enabled?
-        return render layout: 'no_ember'
-      elsif !user.authenticate_second_factor(second_factor_token, second_factor_method)
+        return render json: { error: I18n.t('login.invalid_second_factor_code') }
+      elsif !matched_token.user.authenticate_second_factor(second_factor_token, second_factor_method)
         RateLimiter.new(nil, "second-factor-min-#{request.remote_ip}", 3, 1.minute).performed!
-        @error = I18n.t('login.invalid_second_factor_code')
-        return render layout: 'no_ember'
+        return render json: { error: I18n.t('login.invalid_second_factor_code') }
       end
     end
 
     if user = EmailToken.confirm(token)
       if login_not_approved_for?(user)
-        @error = login_not_approved[:error]
+        return render json: login_not_approved
       elsif payload = login_error_check(user)
-        @error = payload[:error]
+        return render json: payload
       else
         log_on_user(user)
-        return redirect_to path("/")
+        return render json: success_json
       end
-    else
-      @error = I18n.t('email_login.invalid_token')
     end
 
-    render layout: 'no_ember'
+    return render json: { error: I18n.t('email_login.invalid_token') }
   end
 
   def one_time_password

programming_language: Ruby
filename: email_login.html.erb
change_type: ModificationType.DELETE
diff: @@ -1,45 +0,0 @@
-<%if @error%>
-  <div class='alert alert-error'>
-    <%= @error %>
-  </div>
-<%end%>
-
-<%if @second_factor_required%>
-  <div id="simple-container">
-    <div id="primary-second-factor-form">
-      <%= form_tag(method: "post") do%>
-        <h2><%=t "login.second_factor_title" %></h2>
-        <%= label_tag(:second_factor_token, t("login.second_factor_description")) %>
-        <div><%= render 'common/second_factor_text_field' %></div>
-        <%= submit_tag(t("submit"), class: "btn btn-large btn-primary") %>
-      <%end%>
-    </div>
-
-    <%if @backup_codes_enabled%>
-      <div id="backup-second-factor-form" style="display: none">
-        <%= form_tag(method: "post") do%>
-          <h2><%=t "login.second_factor_backup_title" %></h2>
-          <%= label_tag(:second_factor_token, t("login.second_factor_backup_description")) %>
-          <div><%= render 'common/second_factor_backup_input' %></div>
-          <%= submit_tag(t("submit"), class: "btn btn-large btn-primary") %>
-        <%end%>
-      </div>
-      <a href id="toggle-form"><%=t "login.second_factor_toggle.backup_code" %></a>
-      <%= render 'common/second_factor_form_script' %>
-    <%end%>
-  </div>
-<%end%>
-
-
-
-<% content_for :title do %><%=t "email_login.title" %><% end %>
-
-<%- content_for(:no_ember_head) do %>
-  <meta name="referrer" content="no-referrer">
-  <%= preload_script "ember_jquery" %>
-  <%= render_google_universal_analytics_code %>
-<%- end %>
-
-<%- content_for(:head) do %>
-  <meta name="referrer" content="no-referrer">
-<%- end %>

programming_language: unknown
filename: client.en.yml
change_type: ModificationType.MODIFY
diff: @@ -1387,6 +1387,9 @@ en:
       complete_email_found: "We found an account that matches <b>%{email}</b>, you should receive an email with a login link shortly."
       complete_username_not_found: "No account matches the username <b>%{username}</b>"
       complete_email_not_found: "No account matches <b>%{email}</b>"
+      confirm_title: Continue to %{site_name}
+      logging_in_as: Logging in as %{email}
+      confirm_button: Finish Login
 
     login:
       title: "Log In"

programming_language: CoffeeScript
filename: routes.rb
change_type: ModificationType.MODIFY
diff: @@ -337,7 +337,7 @@ Discourse::Application.routes.draw do
   get "session/sso_provider" => "session#sso_provider"
   get "session/current" => "session#current"
   get "session/csrf" => "session#csrf"
-  get "session/email-login/:token" => "session#email_login"
+  get "session/email-login/:token" => "session#email_login_info"
   post "session/email-login/:token" => "session#email_login"
   get "session/otp/:token" => "session#one_time_password", constraints: { token: /[0-9a-f]+/ }
   get "composer_messages" => "composer_messages#index"

programming_language: Ruby
filename: session_controller_spec.rb
change_type: ModificationType.MODIFY
diff: @@ -14,7 +14,7 @@ RSpec.describe SessionController do
     end
   end
 
-  describe '#email_login' do
+  describe '#email_login_info' do
     before do
       SiteSetting.enable_local_logins_via_email = true
     end
@@ -26,13 +26,66 @@ RSpec.describe SessionController do
       end
     end
 
+    context 'valid token' do
+      it 'returns information' do
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(JSON.parse(response.body)["can_login"]).to eq(true)
+        expect(JSON.parse(response.body)["second_factor_required"]).to eq(nil)
+
+        # Does not log in the user
+        expect(session[:current_user_id]).to be_nil
+      end
+
+      it 'fails when local logins via email is disabled' do
+        SiteSetting.enable_local_logins_via_email = false
+
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(response.status).to eq(404)
+      end
+
+      it 'fails when local logins is disabled' do
+        SiteSetting.enable_local_logins = false
+
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(response.status).to eq(500)
+      end
+
+      context 'user has 2-factor logins' do
+        let!(:user_second_factor) { Fabricate(:user_second_factor_totp, user: user) }
+        let!(:user_second_factor_backup) { Fabricate(:user_second_factor_backup, user: user) }
+
+        it "includes that information in the response" do
+          get "/session/email-login/#{email_token.token}.json"
+
+          expect(JSON.parse(response.body)["can_login"]).to eq(true)
+          expect(JSON.parse(response.body)["second_factor_required"]).to eq(true)
+          expect(JSON.parse(response.body)["backup_codes_enabled"]).to eq(true)
+        end
+      end
+    end
+  end
+
+  describe '#email_login' do
+    before do
+      SiteSetting.enable_local_logins_via_email = true
+    end
+
+    context 'missing token' do
+      it 'returns the right response' do
+        post "/session/email-login"
+        expect(response.status).to eq(404)
+      end
+    end
+
     context 'invalid token' do
       it 'returns the right response' do
-        get "/session/email-login/adasdad"
+        post "/session/email-login/adasdad.json"
 
         expect(response.status).to eq(200)
-
-        expect(CGI.unescapeHTML(response.body)).to match(
+        expect(JSON.parse(response.body)["error"]).to eq(
           I18n.t('email_login.invalid_token')
         )
       end
@@ -41,11 +94,11 @@ RSpec.describe SessionController do
         it 'should return the right response' do
           email_token.update!(created_at: 999.years.ago)
 
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to match(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t('email_login.invalid_token')
           )
         end
@@ -54,37 +107,39 @@ RSpec.describe SessionController do
 
     context 'valid token' do
       it 'returns success' do
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
-        expect(response).to redirect_to("/")
+        expect(JSON.parse(response.body)["success"]).to eq("OK")
+        expect(session[:current_user_id]).to eq(user.id)
       end
 
       it 'fails when local logins via email is disabled' do
         SiteSetting.enable_local_logins_via_email = false
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(404)
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       it 'fails when local logins is disabled' do
         SiteSetting.enable_local_logins = false
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(500)
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       it "doesn't log in the user when not approved" do
         SiteSetting.must_approve_users = true
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(200)
 
-        expect(CGI.unescapeHTML(response.body)).to include(
-          I18n.t("login.not_approved")
-        )
+        expect(JSON.parse(response.body)["error"]).to eq(I18n.t("login.not_approved"))
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       context "when admin IP address is not valid" do
@@ -99,13 +154,14 @@ RSpec.describe SessionController do
         end
 
         it 'returns the right response' do
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to include(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t("login.admin_not_allowed_from_ip_address", username: user.username)
           )
+          expect(session[:current_user_id]).to eq(nil)
         end
       end
 
@@ -122,13 +178,14 @@ RSpec.describe SessionController do
         it 'returns the right response' do
           ActionDispatch::Request.any_instance.stubs(:remote_ip).returns(permitted_ip_address)
 
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to include(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t("login.not_allowed_from_ip_address", username: user.username)
           )
+          expect(session[:current_user_id]).to eq(nil)
         end
       end
 
@@ -138,63 +195,48 @@ RSpec.describe SessionController do
           suspended_at: Time.zone.now
         )
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(200)
 
-        expect(CGI.unescapeHTML(response.body)).to include(I18n.t("login.suspended",
-          date: I18n.l(user.suspended_till, format: :date_only)
+        expect(JSON.parse(response.body)["error"]).to eq(
+          I18n.t("login.suspended", date: I18n.l(user.suspended_till, format: :date_only)
         ))
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       context 'user has 2-factor logins' do
         let!(:user_second_factor) { Fabricate(:user_second_factor_totp, user: user) }
         let!(:user_second_factor_backup) { Fabricate(:user_second_factor_backup, user: user) }
 
-        describe 'requires second factor' do
-          it 'should return a second factor prompt' do
-            get "/session/email-login/#{email_token.token}"
-
-            expect(response.status).to eq(200)
-
-            response_body = CGI.unescapeHTML(response.body)
-
-            expect(response_body).to include(I18n.t(
-              "login.second_factor_title"
-            ))
-
-            expect(response_body).to_not include(I18n.t(
-              "login.invalid_second_factor_code"
-            ))
-          end
-        end
-
         describe 'errors on incorrect 2-factor' do
           context 'when using totp method' do
             it 'does not log in with incorrect two factor' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "0000",
                 second_factor_method: UserSecondFactor.methods[:totp]
               }
 
               expect(response.status).to eq(200)
 
-              expect(CGI.unescapeHTML(response.body)).to include(I18n.t(
-                "login.invalid_second_factor_code"
-              ))
+              expect(JSON.parse(response.body)["error"]).to eq(
+                I18n.t("login.invalid_second_factor_code")
+              )
+              expect(session[:current_user_id]).to eq(nil)
             end
           end
           context 'when using backup code method' do
             it 'does not log in with incorrect backup code' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "0000",
                 second_factor_method: UserSecondFactor.methods[:backup_codes]
               }
 
               expect(response.status).to eq(200)
-              expect(CGI.unescapeHTML(response.body)).to include(I18n.t(
-                "login.invalid_second_factor_code"
-              ))
+              expect(JSON.parse(response.body)["error"]).to eq(
+                I18n.t("login.invalid_second_factor_code")
+              )
+              expect(session[:current_user_id]).to eq(nil)
             end
           end
         end
@@ -202,22 +244,24 @@ RSpec.describe SessionController do
         describe 'allows successful 2-factor' do
           context 'when using totp method' do
             it 'logs in correctly' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: ROTP::TOTP.new(user_second_factor.data).now,
                 second_factor_method: UserSecondFactor.methods[:totp]
               }
 
-              expect(response).to redirect_to("/")
+              expect(JSON.parse(response.body)["success"]).to eq("OK")
+              expect(session[:current_user_id]).to eq(user.id)
             end
           end
           context 'when using backup code method' do
             it 'logs in correctly' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "iAmValidBackupCode",
                 second_factor_method: UserSecondFactor.methods[:backup_codes]
               }
 
-              expect(response).to redirect_to("/")
+              expect(JSON.parse(response.body)["success"]).to eq("OK")
+              expect(session[:current_user_id]).to eq(user.id)
             end
           end
         end

programming_language: Ruby
repo_url: https://github.com/discourse/discourse
commit_details: repo_url: https://github.com/discourse/discourse
author: David Taylor
author_date: 2019-06-17 15:59:41+01:00
msg: Merge pull request from GHSA-hv9p-jfm4-gpr9

* SECURITY: Add confirmation screen when logging in via email link

* SECURITY: Add confirmation screen when logging in via user-api OTP

* FIX: Correct translation key in session controller specs

* FIX: Use .email-login class for page
repository: repo_url: https://github.com/discourse/discourse
repo_name: discourse/discourse
description: A platform for community discussion. Free, open, simple.
repo_language: Ruby
owner: discourse
file_changes: filename: email-login.js.es6
change_type: ModificationType.ADD
diff: @@ -0,0 +1,29 @@
+import { SECOND_FACTOR_METHODS } from "discourse/models/user";
+import { ajax } from "discourse/lib/ajax";
+import DiscourseURL from "discourse/lib/url";
+import { popupAjaxError } from "discourse/lib/ajax-error";
+
+export default Ember.Controller.extend({
+  secondFactorMethod: SECOND_FACTOR_METHODS.TOTP,
+  lockImageUrl: Discourse.getURL("/images/lock.svg"),
+  actions: {
+    finishLogin() {
+      ajax({
+        url: `/session/email-login/${this.model.token}`,
+        type: "POST",
+        data: {
+          second_factor_token: this.secondFactorToken,
+          second_factor_method: this.secondFactorMethod
+        }
+      })
+        .then(result => {
+          if (result.success) {
+            DiscourseURL.redirectTo("/");
+          } else {
+            this.set("model.error", result.error);
+          }
+        })
+        .catch(popupAjaxError);
+    }
+  }
+});

programming_language: TypeScript
filename: app-route-map.js.es6
change_type: ModificationType.MODIFY
diff: @@ -177,6 +177,7 @@ export default function() {
   });
   this.route("signup", { path: "/signup" });
   this.route("login", { path: "/login" });
+  this.route("email-login", { path: "/session/email-login/:token" });
   this.route("login-preferences");
   this.route("forgot-password", { path: "/password-reset" });
   this.route("faq", { path: "/faq" });

programming_language: JavaScript
filename: email-login.js.es6
change_type: ModificationType.ADD
diff: @@ -0,0 +1,11 @@
+import { ajax } from "discourse/lib/ajax";
+
+export default Discourse.Route.extend({
+  titleToken() {
+    return I18n.t("login.title");
+  },
+
+  model(params) {
+    return ajax(`/session/email-login/${params.token}`);
+  }
+});

programming_language: TypeScript
filename: email-login.hbs
change_type: ModificationType.ADD
diff: @@ -0,0 +1,33 @@
+<div class="container email-login clearfix">
+  <div class="pull-left col-image">
+    <img src={{lockImageUrl}} class="password-reset-img">
+  </div>
+
+  <div class="pull-left col-form">
+    <form>
+      {{#if model.error}}
+        <div class='alert alert-error'>
+          {{model.error}}
+        </div>
+      {{/if}}
+
+      {{#if model.can_login}}
+        {{#if model.second_factor_required}}
+          {{#second-factor-form
+            secondFactorMethod=secondFactorMethod
+            secondFactorToken=secondFactorToken
+            backupEnabled=model.backup_codes_enabled
+            isLogin=true}}
+            {{second-factor-input value=secondFactorToken secondFactorMethod=secondFactorMethod backupEnabled=backupEnabled}}
+          {{/second-factor-form}}
+        {{else}}
+          <h2>{{i18n "email_login.confirm_title" site_name=siteSettings.title}}</h2>
+          <p>{{i18n "email_login.logging_in_as" email=model.token_email}}</p>
+        {{/if}}
+
+        {{d-button label="email_login.confirm_button" action=(action "finishLogin") class="btn-primary"}}
+      {{/if}}
+    </form>
+  </div>
+</div>
+

programming_language: HTML
filename: login.scss
change_type: ModificationType.MODIFY
diff: @@ -267,6 +267,7 @@
 }
 
 .password-reset,
+.email-login,
 .invites-show {
   .col-form {
     padding-left: 20px;
@@ -282,7 +283,8 @@
   }
 }
 
-.password-reset {
+.password-reset,
+.email-login {
   .col-form {
     padding-top: 40px;
   }

programming_language: CSS
filename: login.scss
change_type: ModificationType.MODIFY
diff: @@ -182,6 +182,7 @@
 }
 
 .password-reset,
+.email-login,
 .invites-show {
   margin-top: 30px;
   .col-image {

programming_language: CSS
filename: session_controller.rb
change_type: ModificationType.MODIFY
diff: @@ -11,10 +11,10 @@ class SessionController < ApplicationController
     render body: nil, status: 500
   end
 
-  before_action :check_local_login_allowed, only: %i(create forgot_password email_login)
+  before_action :check_local_login_allowed, only: %i(create forgot_password email_login email_login_info)
   before_action :rate_limit_login, only: %i(create email_login)
   skip_before_action :redirect_to_login_if_required
-  skip_before_action :preload_json, :check_xhr, only: %i(sso sso_login sso_provider destroy email_login one_time_password)
+  skip_before_action :preload_json, :check_xhr, only: %i(sso sso_login sso_provider destroy one_time_password)
 
   ACTIVATE_USER_KEY = "activate_user"
 
@@ -305,49 +305,79 @@ class SessionController < ApplicationController
     end
   end
 
+  def email_login_info
+    raise Discourse::NotFound if !SiteSetting.enable_local_logins_via_email
+
+    token = params[:token]
+    matched_token = EmailToken.confirmable(token)
+
+    if matched_token
+      response = {
+        can_login: true,
+        token: token,
+        token_email: matched_token.email
+      }
+
+      if matched_token.user&.totp_enabled?
+        response.merge!(
+          second_factor_required: true,
+          backup_codes_enabled: matched_token.user&.backup_codes_enabled?
+        )
+      end
+
+      render json: response
+    else
+      render json: {
+        can_login: false,
+        error: I18n.t('email_login.invalid_token')
+      }
+    end
+  end
+
   def email_login
     raise Discourse::NotFound if !SiteSetting.enable_local_logins_via_email
     second_factor_token = params[:second_factor_token]
     second_factor_method = params[:second_factor_method].to_i
     token = params[:token]
-    valid_token = !!EmailToken.valid_token_format?(token)
-    user = EmailToken.confirmable(token)&.user
+    matched_token = EmailToken.confirmable(token)
 
-    if valid_token && user&.totp_enabled?
+    if matched_token&.user&.totp_enabled?
       if !second_factor_token.present?
-        @second_factor_required = true
-        @backup_codes_enabled = true if user&.backup_codes_enabled?
-        return render layout: 'no_ember'
-      elsif !user.authenticate_second_factor(second_factor_token, second_factor_method)
+        return render json: { error: I18n.t('login.invalid_second_factor_code') }
+      elsif !matched_token.user.authenticate_second_factor(second_factor_token, second_factor_method)
         RateLimiter.new(nil, "second-factor-min-#{request.remote_ip}", 3, 1.minute).performed!
-        @error = I18n.t('login.invalid_second_factor_code')
-        return render layout: 'no_ember'
+        return render json: { error: I18n.t('login.invalid_second_factor_code') }
       end
     end
 
     if user = EmailToken.confirm(token)
       if login_not_approved_for?(user)
-        @error = login_not_approved[:error]
+        return render json: login_not_approved
       elsif payload = login_error_check(user)
-        @error = payload[:error]
+        return render json: payload
       else
         log_on_user(user)
-        return redirect_to path("/")
+        return render json: success_json
       end
-    else
-      @error = I18n.t('email_login.invalid_token')
     end
 
-    render layout: 'no_ember'
+    return render json: { error: I18n.t('email_login.invalid_token') }
   end
 
   def one_time_password
-    otp_username = $redis.get "otp_#{params[:token]}"
+    @otp_username = otp_username = $redis.get "otp_#{params[:token]}"
 
     if otp_username && user = User.find_by_username(otp_username)
-      log_on_user(user)
-      $redis.del "otp_#{params[:token]}"
-      return redirect_to path("/")
+      if current_user&.username == otp_username
+        $redis.del "otp_#{params[:token]}"
+        return redirect_to path("/")
+      elsif request.post?
+        log_on_user(user)
+        $redis.del "otp_#{params[:token]}"
+        return redirect_to path("/")
+      else
+        # Display the form
+      end
     else
       @error = I18n.t('user_api_key.invalid_token')
     end

programming_language: Ruby
filename: email_login.html.erb
change_type: ModificationType.DELETE
diff: @@ -1,45 +0,0 @@
-<%if @error%>
-  <div class='alert alert-error'>
-    <%= @error %>
-  </div>
-<%end%>
-
-<%if @second_factor_required%>
-  <div id="simple-container">
-    <div id="primary-second-factor-form">
-      <%= form_tag(method: "post") do%>
-        <h2><%=t "login.second_factor_title" %></h2>
-        <%= label_tag(:second_factor_token, t("login.second_factor_description")) %>
-        <div><%= render 'common/second_factor_text_field' %></div>
-        <%= submit_tag(t("submit"), class: "btn btn-large btn-primary") %>
-      <%end%>
-    </div>
-
-    <%if @backup_codes_enabled%>
-      <div id="backup-second-factor-form" style="display: none">
-        <%= form_tag(method: "post") do%>
-          <h2><%=t "login.second_factor_backup_title" %></h2>
-          <%= label_tag(:second_factor_token, t("login.second_factor_backup_description")) %>
-          <div><%= render 'common/second_factor_backup_input' %></div>
-          <%= submit_tag(t("submit"), class: "btn btn-large btn-primary") %>
-        <%end%>
-      </div>
-      <a href id="toggle-form"><%=t "login.second_factor_toggle.backup_code" %></a>
-      <%= render 'common/second_factor_form_script' %>
-    <%end%>
-  </div>
-<%end%>
-
-
-
-<% content_for :title do %><%=t "email_login.title" %><% end %>
-
-<%- content_for(:no_ember_head) do %>
-  <meta name="referrer" content="no-referrer">
-  <%= preload_script "ember_jquery" %>
-  <%= render_google_universal_analytics_code %>
-<%- end %>
-
-<%- content_for(:head) do %>
-  <meta name="referrer" content="no-referrer">
-<%- end %>

programming_language: unknown
filename: one_time_password.html.erb
change_type: ModificationType.MODIFY
diff: @@ -2,4 +2,10 @@
   <div class='alert alert-error'>
     <%= @error %>
   </div>
+<%else%>
+  <%= form_tag do%>
+    <h2><%= t("user_api_key.otp_confirmation.confirm_title", site_name: SiteSetting.title) %></h2>
+    <p><%= t("user_api_key.otp_confirmation.logging_in_as", username: @otp_username) %></p>
+    <%= submit_tag(t("user_api_key.otp_confirmation.confirm_button"), class: "btn btn-primary") %>
+  <%end%>
 <%end%>

programming_language: CoffeeScript
filename: client.en.yml
change_type: ModificationType.MODIFY
diff: @@ -1387,6 +1387,9 @@ en:
       complete_email_found: "We found an account that matches <b>%{email}</b>, you should receive an email with a login link shortly."
       complete_username_not_found: "No account matches the username <b>%{username}</b>"
       complete_email_not_found: "No account matches <b>%{email}</b>"
+      confirm_title: Continue to %{site_name}
+      logging_in_as: Logging in as %{email}
+      confirm_button: Finish Login
 
     login:
       title: "Log In"

programming_language: CoffeeScript
filename: server.en.yml
change_type: ModificationType.MODIFY
diff: @@ -939,6 +939,10 @@ en:
     description: '"%{application_name}" is requesting the following access to your account:'
     instructions: 'We just generated a new user API key for you to use with "%{application_name}", please paste the following key into your application:'
     otp_description: 'Would you like to allow "%{application_name}" to access this site?'
+    otp_confirmation: 
+      confirm_title: Continue to %{site_name}
+      logging_in_as: Logging in as %{username}
+      confirm_button: Finish Login
     no_trust_level: "Sorry, you do not have the required trust level to access the user API"
     generic_error: "Sorry, we are unable to issue user API keys, this feature may be disabled by the site admin"
     scopes:

programming_language: Ruby
filename: routes.rb
change_type: ModificationType.MODIFY
diff: @@ -337,9 +337,10 @@ Discourse::Application.routes.draw do
   get "session/sso_provider" => "session#sso_provider"
   get "session/current" => "session#current"
   get "session/csrf" => "session#csrf"
-  get "session/email-login/:token" => "session#email_login"
+  get "session/email-login/:token" => "session#email_login_info"
   post "session/email-login/:token" => "session#email_login"
   get "session/otp/:token" => "session#one_time_password", constraints: { token: /[0-9a-f]+/ }
+  post "session/otp/:token" => "session#one_time_password", constraints: { token: /[0-9a-f]+/ }
   get "composer_messages" => "composer_messages#index"
   post "composer/parse_html" => "composer#parse_html"
 

programming_language: Ruby
filename: session_controller_spec.rb
change_type: ModificationType.MODIFY
diff: @@ -14,7 +14,7 @@ RSpec.describe SessionController do
     end
   end
 
-  describe '#email_login' do
+  describe '#email_login_info' do
     before do
       SiteSetting.enable_local_logins_via_email = true
     end
@@ -26,13 +26,66 @@ RSpec.describe SessionController do
       end
     end
 
+    context 'valid token' do
+      it 'returns information' do
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(JSON.parse(response.body)["can_login"]).to eq(true)
+        expect(JSON.parse(response.body)["second_factor_required"]).to eq(nil)
+
+        # Does not log in the user
+        expect(session[:current_user_id]).to be_nil
+      end
+
+      it 'fails when local logins via email is disabled' do
+        SiteSetting.enable_local_logins_via_email = false
+
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(response.status).to eq(404)
+      end
+
+      it 'fails when local logins is disabled' do
+        SiteSetting.enable_local_logins = false
+
+        get "/session/email-login/#{email_token.token}.json"
+
+        expect(response.status).to eq(500)
+      end
+
+      context 'user has 2-factor logins' do
+        let!(:user_second_factor) { Fabricate(:user_second_factor_totp, user: user) }
+        let!(:user_second_factor_backup) { Fabricate(:user_second_factor_backup, user: user) }
+
+        it "includes that information in the response" do
+          get "/session/email-login/#{email_token.token}.json"
+
+          expect(JSON.parse(response.body)["can_login"]).to eq(true)
+          expect(JSON.parse(response.body)["second_factor_required"]).to eq(true)
+          expect(JSON.parse(response.body)["backup_codes_enabled"]).to eq(true)
+        end
+      end
+    end
+  end
+
+  describe '#email_login' do
+    before do
+      SiteSetting.enable_local_logins_via_email = true
+    end
+
+    context 'missing token' do
+      it 'returns the right response' do
+        post "/session/email-login"
+        expect(response.status).to eq(404)
+      end
+    end
+
     context 'invalid token' do
       it 'returns the right response' do
-        get "/session/email-login/adasdad"
+        post "/session/email-login/adasdad.json"
 
         expect(response.status).to eq(200)
-
-        expect(CGI.unescapeHTML(response.body)).to match(
+        expect(JSON.parse(response.body)["error"]).to eq(
           I18n.t('email_login.invalid_token')
         )
       end
@@ -41,11 +94,11 @@ RSpec.describe SessionController do
         it 'should return the right response' do
           email_token.update!(created_at: 999.years.ago)
 
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to match(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t('email_login.invalid_token')
           )
         end
@@ -54,37 +107,39 @@ RSpec.describe SessionController do
 
     context 'valid token' do
       it 'returns success' do
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
-        expect(response).to redirect_to("/")
+        expect(JSON.parse(response.body)["success"]).to eq("OK")
+        expect(session[:current_user_id]).to eq(user.id)
       end
 
       it 'fails when local logins via email is disabled' do
         SiteSetting.enable_local_logins_via_email = false
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(404)
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       it 'fails when local logins is disabled' do
         SiteSetting.enable_local_logins = false
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(500)
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       it "doesn't log in the user when not approved" do
         SiteSetting.must_approve_users = true
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(200)
 
-        expect(CGI.unescapeHTML(response.body)).to include(
-          I18n.t("login.not_approved")
-        )
+        expect(JSON.parse(response.body)["error"]).to eq(I18n.t("login.not_approved"))
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       context "when admin IP address is not valid" do
@@ -99,13 +154,14 @@ RSpec.describe SessionController do
         end
 
         it 'returns the right response' do
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to include(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t("login.admin_not_allowed_from_ip_address", username: user.username)
           )
+          expect(session[:current_user_id]).to eq(nil)
         end
       end
 
@@ -122,13 +178,14 @@ RSpec.describe SessionController do
         it 'returns the right response' do
           ActionDispatch::Request.any_instance.stubs(:remote_ip).returns(permitted_ip_address)
 
-          get "/session/email-login/#{email_token.token}"
+          post "/session/email-login/#{email_token.token}.json"
 
           expect(response.status).to eq(200)
 
-          expect(CGI.unescapeHTML(response.body)).to include(
+          expect(JSON.parse(response.body)["error"]).to eq(
             I18n.t("login.not_allowed_from_ip_address", username: user.username)
           )
+          expect(session[:current_user_id]).to eq(nil)
         end
       end
 
@@ -138,63 +195,48 @@ RSpec.describe SessionController do
           suspended_at: Time.zone.now
         )
 
-        get "/session/email-login/#{email_token.token}"
+        post "/session/email-login/#{email_token.token}.json"
 
         expect(response.status).to eq(200)
 
-        expect(CGI.unescapeHTML(response.body)).to include(I18n.t("login.suspended",
-          date: I18n.l(user.suspended_till, format: :date_only)
+        expect(JSON.parse(response.body)["error"]).to eq(
+          I18n.t("login.suspended", date: I18n.l(user.suspended_till, format: :date_only)
         ))
+        expect(session[:current_user_id]).to eq(nil)
       end
 
       context 'user has 2-factor logins' do
         let!(:user_second_factor) { Fabricate(:user_second_factor_totp, user: user) }
         let!(:user_second_factor_backup) { Fabricate(:user_second_factor_backup, user: user) }
 
-        describe 'requires second factor' do
-          it 'should return a second factor prompt' do
-            get "/session/email-login/#{email_token.token}"
-
-            expect(response.status).to eq(200)
-
-            response_body = CGI.unescapeHTML(response.body)
-
-            expect(response_body).to include(I18n.t(
-              "login.second_factor_title"
-            ))
-
-            expect(response_body).to_not include(I18n.t(
-              "login.invalid_second_factor_code"
-            ))
-          end
-        end
-
         describe 'errors on incorrect 2-factor' do
           context 'when using totp method' do
             it 'does not log in with incorrect two factor' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "0000",
                 second_factor_method: UserSecondFactor.methods[:totp]
               }
 
               expect(response.status).to eq(200)
 
-              expect(CGI.unescapeHTML(response.body)).to include(I18n.t(
-                "login.invalid_second_factor_code"
-              ))
+              expect(JSON.parse(response.body)["error"]).to eq(
+                I18n.t("login.invalid_second_factor_code")
+              )
+              expect(session[:current_user_id]).to eq(nil)
             end
           end
           context 'when using backup code method' do
             it 'does not log in with incorrect backup code' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "0000",
                 second_factor_method: UserSecondFactor.methods[:backup_codes]
               }
 
               expect(response.status).to eq(200)
-              expect(CGI.unescapeHTML(response.body)).to include(I18n.t(
-                "login.invalid_second_factor_code"
-              ))
+              expect(JSON.parse(response.body)["error"]).to eq(
+                I18n.t("login.invalid_second_factor_code")
+              )
+              expect(session[:current_user_id]).to eq(nil)
             end
           end
         end
@@ -202,22 +244,24 @@ RSpec.describe SessionController do
         describe 'allows successful 2-factor' do
           context 'when using totp method' do
             it 'logs in correctly' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: ROTP::TOTP.new(user_second_factor.data).now,
                 second_factor_method: UserSecondFactor.methods[:totp]
               }
 
-              expect(response).to redirect_to("/")
+              expect(JSON.parse(response.body)["success"]).to eq("OK")
+              expect(session[:current_user_id]).to eq(user.id)
             end
           end
           context 'when using backup code method' do
             it 'logs in correctly' do
-              post "/session/email-login/#{email_token.token}", params: {
+              post "/session/email-login/#{email_token.token}.json", params: {
                 second_factor_token: "iAmValidBackupCode",
                 second_factor_method: UserSecondFactor.methods[:backup_codes]
               }
 
-              expect(response).to redirect_to("/")
+              expect(JSON.parse(response.body)["success"]).to eq("OK")
+              expect(session[:current_user_id]).to eq(user.id)
             end
           end
         end
@@ -1325,9 +1369,40 @@ RSpec.describe SessionController do
         get "/session/otp/asd1231dasd123"
 
         expect(response.status).to eq(404)
+
+        post "/session/otp/asd1231dasd123"
+
+        expect(response.status).to eq(404)
       end
 
       context 'when token is valid' do
+        it "should display the form for GET" do
+          token = SecureRandom.hex
+          $redis.setex "otp_#{token}", 10.minutes, user.username
+
+          get "/session/otp/#{token}"
+
+          expect(response.status).to eq(200)
+          expect(response.body).to include(
+            I18n.t("user_api_key.otp_confirmation.logging_in_as", username: user.username)
+          )
+          expect($redis.get("otp_#{token}")).to eq(user.username)
+
+          expect(session[:current_user_id]).to eq(nil)
+        end
+
+        it "should redirect on GET if already logged in" do
+          sign_in(user)
+          token = SecureRandom.hex
+          $redis.setex "otp_#{token}", 10.minutes, user.username
+
+          get "/session/otp/#{token}"
+          expect(response.status).to eq(302)
+
+          expect($redis.get("otp_#{token}")).to eq(nil)
+          expect(session[:current_user_id]).to eq(user.id)
+        end
+
         it 'should authenticate user and delete token' do
           user = Fabricate(:user)
 
@@ -1337,7 +1412,7 @@ RSpec.describe SessionController do
           token = SecureRandom.hex
           $redis.setex "otp_#{token}", 10.minutes, user.username
 
-          get "/session/otp/#{token}"
+          post "/session/otp/#{token}"
 
           expect(response.status).to eq(302)
           expect(response).to redirect_to("/")

programming_language: Ruby