Project: KICS (Provisioning / Security & Compliance)
File: 39cb32f2-3a42-4af0-8037-82a7a9654b6c.md

title: OAuth2 With Implicit Flow hide: toc: true navigation: true <style> .highlight .hll { background-color: #ff171742; } .md-content { max-width: 1100px; margin: 0 auto; } </style> Query id: 39cb32f2-3a42-4af0-8037-82a7a9654b6c Query name: OAuth2 With Implicit Flow Platform: OpenAPI Severity: <span style="color:#ff7213">Medium</span> Category: Access Control URL: OAuth2 implicit flow is vulnerable to access token leakage and access token replay<br> ```json title="Positive test num. 1 - json file" hl_lines="58" { "openapi": "3.0.0", "info": { "title": "Simple API Overview", "version": "1.0.0", "contact": { "name": "contact", "url": "https://www.google.com/", "email": "user@gmail.c" } }, "paths": { "/": { "get": { "operationId": "listVersionsv2", "summary": "List API versions", "responses": { "200": { "description": "200 response", "content": { "application/json": { "examples": { "foo": { "value": { "versions": [ { "status": "CURRENT", "updated": "2011-01-21T11:33:21Z", "id": "v2.0", "links": [ { "href": "http://127.0.0.1:8774/v2/", "rel": "self" } ] } ] } } } } } } } } } }, "components": { "securitySchemes": { "api_key": { "type": "apiKey", "name": "api_key", "in": "header" }, "petstore_auth": { "type": "oauth2", "flows": { "implicit": { "authorizationUrl": "http://example.org/api/oauth/dialog", "scopes": { "write:pets": "modify pets in your account", "read:pets": "read your pets" } } } } } } } ``` ```yaml title="Positive test num. 2 - yaml file" hl_lines="34" openapi: 3.0.0 info: title: Simple API Overview version: 1.0.0 paths: "/": get: operationId: listVersionsv2 summary: List API versions responses: "200": description: 200 response content: application/json: examples: foo: value: versions: status: CURRENT updated: "2011-01-21T11:33:21Z" id: v2.0 links: href: http://127.0.0.1:8774/v2/ rel: self components: securitySchemes: api_key: type: apiKey name: api_key in: header petstore_auth: type: oauth2 flows: implicit: authorizationUrl: http://example.org/api/oauth/dialog scopes: write:pets: modify pets in your account read:pets: read your pets ``` ```json title="Negative test num. 1 - json file" { "openapi": "3.0.0", "info": { "title": "Simple API Overview", "version": "1.0.0", "contact": { "name": "contact", "url": "https://www.google.com/", "email": "user@gmail.c" } }, "paths": { "/": { "get": { "operationId": "listVersionsv2", "summary": "List API versions", "responses": { "200": { "description": "200 response", "content": { "application/json": { "examples": { "foo": { "value": { "versions": [ { "status": "CURRENT", "updated": "2011-01-21T11:33:21Z", "id": "v2.0", "links": [ { "href": "http://127.0.0.1:8774/v2/", "rel": "self" } ] } ] } } } } } } } } } }, "components": { "securitySchemes": { "api_key": { "type": "apiKey", "name": "api_key", "in": "header" }, "petstore_auth": { "type": "oauth2", "flows": { "authorizationCode": { "tokenUrl": "https://example.com/api/oauth/token", "authorizationUrl": "http://example.org/api/oauth/dialog", "scopes": { "write:pets": "modify pets in your account", "read:pets": "read your pets" } } } } } } } ``` ```yaml title="Negative test num. 2 - yaml file" openapi: 3.0.0 info: title: Simple API Overview version: 1.0.0 paths: "/": get: operationId: listVersionsv2 summary: List API versions responses: "200": description: 200 response content: application/json: examples: foo: value: versions: status: CURRENT updated: "2011-01-21T11:33:21Z" id: v2.0 links: href: http://127.0.0.1:8774/v2/ rel: self components: securitySchemes: api_key: type: apiKey name: api_key in: header petstore_auth: type: oauth2 flows: authorizationCode: tokenUrl: https://example.com/api/oauth/token authorizationUrl: http://example.org/api/oauth/dialog scopes: write:pets: modify pets in your account read:pets: read your pets ```