CVE-2017-11593 (published 2017-07-24T01:29Z)

Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, markdown, or rst files that are designed to be viewed in the browser as plain text, but that will be converted to HTML without proper sanitization.

Severity: MEDIUM
CVSS v2 base score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
CVSS v3 base score: 6.1, MEDIUM (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Weakness information:
cwe_id: CWE-79
cwe_name: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
description: The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
extended_description: 
            Cross-site scripting (XSS) vulnerabilities occur when:
            
               Untrusted data enters a web application, typically from a web request.
               The web application dynamically generates a web page that contains this untrusted data.
               During page generation, the application does not prevent the data from containing content that is executable by a web browser, such as JavaScript, HTML tags, HTML attributes, mouse events, Flash, ActiveX, etc.
               A victim visits the generated web page through a web browser, which contains malicious script that was injected using the untrusted data.
               Since the script comes from a web page that was sent by the web server, the victim's web browser executes the malicious script in the context of the web server's domain.
               This effectively violates the intention of the web browser's same-origin policy, which states that scripts in one domain should not be able to access resources or run code in a different domain.
            
            There are three main kinds of XSS:
            
               
                  Type 1: Reflected XSS (or Non-Persistent) - 
         			The server reads data directly from the HTTP request and reflects it back in the HTTP response. Reflected XSS exploits occur when an attacker causes a victim to supply dangerous content to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. The most common mechanism for delivering malicious content is to include it as a parameter in a URL that is posted publicly or e-mailed directly to the victim. URLs constructed in this manner constitute the core of many phishing schemes, whereby an attacker convinces a victim to visit a URL that refers to a vulnerable site. After the site reflects the attacker's content back to the victim, the content is executed by the victim's browser.
               
                  Type 2: Stored XSS (or Persistent) - 
               The application stores dangerous data in a database, message forum, visitor log, or other trusted data store. At a later time, the dangerous data is subsequently read back into the application and included in dynamic content. From an attacker's perspective, the optimal place to inject malicious content is in an area that is displayed to either many users or particularly interesting users. Interesting users typically have elevated privileges in the application or interact with sensitive data that is valuable to the attacker. If one of these users executes malicious content, the attacker may be able to perform privileged operations on behalf of the user or gain access to sensitive data belonging to the user. For example, the attacker might inject XSS into a log message, which might not be handled properly when an administrator views the logs.
            
               
                  Type 0: DOM-Based XSS - 
               In DOM-based XSS, the client performs the injection of XSS into the page; in the other types, the server performs the injection. DOM-based XSS generally involves server-controlled, trusted script that is sent to the client, such as Javascript that performs sanity checks on a form before the user submits it. If the server-supplied script processes user-supplied data and then injects it back into the web page (such as with dynamic HTML), then DOM-based XSS is possible.
            
            
            Once the malicious script is injected, the attacker can perform a variety of malicious activities. The attacker could transfer private information, such as cookies that may include session information, from the victim's machine to the attacker. The attacker could send malicious requests to a web site on behalf of the victim, which could be especially dangerous to the site if the victim has administrator privileges to manage that site. Phishing attacks could be used to emulate trusted web sites and trick the victim into entering a password, allowing the attacker to compromise the victim's account on that web site. Finally, the script could exploit a vulnerability in the web browser itself possibly taking over the victim's machine, sometimes referred to as "drive-by hacking."
            In many cases, the attack can be launched without the victim even being aware of it. Even with careful users, attackers frequently use a variety of methods to encode the malicious portion of the attack, such as URL encoding or Unicode, so the request looks less suspicious.
         
         

Fix information:
repo_url: https://github.com/volca/markdown-preview
commit_details: repo_url: https://github.com/volca/markdown-preview
author: volca
author_date: 2017-03-07 11:05:57+08:00
msg: Fixes #60 xss
repository: repo_url: https://github.com/volca/markdown-preview
repo_name: volca/markdown-preview
description: Markdown Preview Plus -- Enables Chrome to render markdown files as HTML
repo_language: JavaScript
owner: volca
file_changes: filename: config.js
change_type: ModificationType.MODIFY
diff: @@ -10,6 +10,7 @@ window.config = (function(hljs) {
         gfm: true,
         tables: true,
         breaks: false,
+        sanitize: true,
         highlight: function(code) {
             return hljs.highlightAuto(code).value;
         }

programming_language: TypeScript
filename: markdownify.js
change_type: ModificationType.MODIFY
diff: @@ -27,6 +27,7 @@
             // Convert MarkDown to HTML without MathJax typesetting.
             // This is done to make page responsiveness.  The HTML body
             // is replaced after MathJax typesetting.
+            config.markedOptions.sanitize = items.mathjax ? false : true;
             marked.setOptions(config.markedOptions);
             var html = marked(data);
             $(document.body).html(html);

programming_language: JavaScript
filename: marked.js
change_type: ModificationType.MODIFY
diff: @@ -3,4 +3,1284 @@
  * Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
  * https://github.com/chjj/marked
  */
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parser.parse(src)};Parser.prototype.parse=function(src){this.inline=new InlineLexer(src.links,this.options,this.renderer);this.tokens=src.reverse();var out="";while(this.next()){out+=this.tok()}return out};Parser.prototype.next=function(){return this.token=this.tokens.pop()};Parser.prototype.peek=function(){return this.tokens[this.tokens.length-1]||0};Parser.prototype.parseText=function(){var body=this.token.text;while(this.peek().type==="text"){body+="\n"+this.next().text}return this.inline.output(body)};Parser.prototype.tok=function(){switch(this.token.type){case"space":{return""}case"hr":{return this.renderer.hr()}case"heading":{return this.renderer.heading(this.inline.output(this.token.text),this.token.depth,this.token.text)}case"code":{return this.renderer.code(this.token.text,this.token.lang,this.token.escaped)}case"table":{var header="",body="",i,row,cell,flags,j;cell="";for(i=0;i<this.token.header.length;i++){flags={header:true,align:this.token.align[i]};cell+=this.renderer.tablecell(this.inline.output(this.token.header[i]),{header:true,align:this.token.align[i]})}header+=this.renderer.tablerow(cell);for(i=0;i<this.token.cells.length;i++){row=this.token.cells[i];cell="";for(j=0;j<row.length;j++){cell+=this.renderer.tablecell(this.inline.output(row[j]),{header:false,align:this.token.align[j]})}body+=this.renderer.tablerow(cell)}return this.renderer.table(header,body)}case"blockquote_start":{var body="";while(this.next().type!=="blockquote_end"){body+=this.tok()}return this.renderer.blockquote(body)}case"list_start":{var body="",ordered=this.token.ordered;while(this.next().type!=="list_end"){body+=this.tok()}return this.renderer.list(body,ordered)}case"list_item_start":{var body="";while(this.next().type!=="list_item_end"){body+=this.token.type==="text"?this.parseText():this.tok()}return this.renderer.listitem(body)}case"loose_item_start":{var body="";while(this.next().type!=="list_item_end"){body+=this.tok()}return this.renderer.listitem(body)}case"html":{var html=!this.token.pre&&!this.options.pedantic?this.inline.output(this.token.text):this.token.text;return this.renderer.html(html)}case"paragraph":{return this.renderer.paragraph(this.inline.output(this.token.text))}case"text":{return this.renderer.paragraph(this.parseText())}}};function escape(html,encode){return html.replace(!encode?/&(?!#?\w+;)/g:/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;").replace(/'/g,"&#39;")}function unescape(html){return html.replace(/&([#\w]+);/g,function(_,n){n=n.toLowerCase();if(n==="colon")return":";if(n.charAt(0)==="#"){return n.charAt(1)==="x"?String.fromCharCode(parseInt(n.substring(2),16)):String.fromCharCode(+n.substring(1))}return""})}function replace(regex,opt){regex=regex.source;opt=opt||"";return function self(name,val){if(!name)return new RegExp(regex,opt);val=val.source||val;val=val.replace(/(^|[^\[])\^/g,"$1");regex=regex.replace(name,val);return self}}function noop(){}noop.exec=noop;function merge(obj){var i=1,target,key;for(;i<arguments.length;i++){target=arguments[i];for(key in target){if(Object.prototype.hasOwnProperty.call(target,key)){obj[key]=target[key]}}}return obj}function marked(src,opt,callback){if(callback||typeof opt==="function"){if(!callback){callback=opt;opt=null}opt=merge({},marked.defaults,opt||{});var highlight=opt.highlight,tokens,pending,i=0;try{tokens=Lexer.lex(src,opt)}catch(e){return callback(e)}pending=tokens.length;var done=function(err){if(err){opt.highlight=highlight;return callback(err)}var out;try{out=Parser.parse(tokens,opt)}catch(e){err=e}opt.highlight=highlight;return err?callback(err):callback(null,out)};if(!highlight||highlight.length<3){return done()}delete opt.highlight;if(!pending)return done();for(;i<tokens.length;i++){(function(token){if(token.type!=="code"){return--pending||done()}return highlight(token.text,token.lang,function(err,code){if(err)return done(err);if(code==null||code===token.text){return--pending||done()}token.text=code;token.escaped=true;--pending||done()})})(tokens[i])}return}try{if(opt)opt=merge({},marked.defaults,opt);return Parser.parse(Lexer.lex(src,opt),opt)}catch(e){e.message+="\nPlease report this to https://github.com/chjj/marked.";if((opt||marked.defaults).silent){return"<p>An error occured:</p><pre>"+escape(e.message+"",true)+"</pre>"}throw e}}marked.options=marked.setOptions=function(opt){merge(marked.defaults,opt);return marked};marked.defaults={gfm:true,tables:true,breaks:false,pedantic:false,sanitize:false,sanitizer:null,mangle:true,smartLists:false,silent:false,highlight:null,langPrefix:"lang-",smartypants:false,headerPrefix:"",renderer:new Renderer,xhtml:false};marked.Parser=Parser;marked.parser=Parser.parse;marked.Renderer=Renderer;marked.Lexer=Lexer;marked.lexer=Lexer.lex;marked.InlineLexer=InlineLexer;marked.inlineLexer=InlineLexer.output;marked.parse=marked;if(typeof module!=="undefined"&&typeof exports==="object"){module.exports=marked}else if(typeof define==="function"&&define.amd){define(function(){return marked})}else{this.marked=marked}}).call(function(){return this||(typeof window!=="undefined"?window:global)}());
+
+;(function() {
+
+/**
+ * Block-Level Grammar
+ */
+
+var block = {
+  newline: /^\n+/,
+  code: /^( {4}[^\n]+\n*)+/,
+  fences: noop,
+  hr: /^( *[-*_]){3,} *(?:\n+|$)/,
+  heading: /^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,
+  nptable: noop,
+  lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
+  blockquote: /^( *>[^\n]+(\n(?!def)[^\n]+)*\n*)+/,
+  list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
+  html: /^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,
+  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +["(]([^\n]+)[")])? *(?:\n+|$)/,
+  table: noop,
+  paragraph: /^((?:[^\n]+\n?(?!hr|heading|lheading|blockquote|tag|def))+)\n*/,
+  text: /^[^\n]+/
+};
+
+block.bullet = /(?:[*+-]|\d+\.)/;
+block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
+block.item = replace(block.item, 'gm')
+  (/bull/g, block.bullet)
+  ();
+
+block.list = replace(block.list)
+  (/bull/g, block.bullet)
+  ('hr', '\\n+(?=\\1?(?:[-*_] *){3,}(?:\\n+|$))')
+  ('def', '\\n+(?=' + block.def.source + ')')
+  ();
+
+block.blockquote = replace(block.blockquote)
+  ('def', block.def)
+  ();
+
+block._tag = '(?!(?:'
+  + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code'
+  + '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo'
+  + '|span|br|wbr|ins|del|img)\\b)\\w+(?!:/|[^\\w\\s@]*@)\\b';
+
+block.html = replace(block.html)
+  ('comment', /<!--[\s\S]*?-->/)
+  ('closed', /<(tag)[\s\S]+?<\/\1>/)
+  ('closing', /<tag(?:"[^"]*"|'[^']*'|[^'">])*?>/)
+  (/tag/g, block._tag)
+  ();
+
+block.paragraph = replace(block.paragraph)
+  ('hr', block.hr)
+  ('heading', block.heading)
+  ('lheading', block.lheading)
+  ('blockquote', block.blockquote)
+  ('tag', '<' + block._tag)
+  ('def', block.def)
+  ();
+
+/**
+ * Normal Block Grammar
+ */
+
+block.normal = merge({}, block);
+
+/**
+ * GFM Block Grammar
+ */
+
+block.gfm = merge({}, block.normal, {
+  fences: /^ *(`{3,}|~{3,})[ \.]*(\S+)? *\n([\s\S]*?)\s*\1 *(?:\n+|$)/,
+  paragraph: /^/,
+  heading: /^ *(#{1,6}) +([^\n]+?) *#* *(?:\n+|$)/
+});
+
+block.gfm.paragraph = replace(block.paragraph)
+  ('(?!', '(?!'
+    + block.gfm.fences.source.replace('\\1', '\\2') + '|'
+    + block.list.source.replace('\\1', '\\3') + '|')
+  ();
+
+/**
+ * GFM + Tables Block Grammar
+ */
+
+block.tables = merge({}, block.gfm, {
+  nptable: /^ *(\S.*\|.*)\n *([-:]+ *\|[-| :]*)\n((?:.*\|.*(?:\n|$))*)\n*/,
+  table: /^ *\|(.+)\n *\|( *[-:]+[-| :]*)\n((?: *\|.*(?:\n|$))*)\n*/
+});
+
+/**
+ * Block Lexer
+ */
+
+function Lexer(options) {
+  this.tokens = [];
+  this.tokens.links = {};
+  this.options = options || marked.defaults;
+  this.rules = block.normal;
+
+  if (this.options.gfm) {
+    if (this.options.tables) {
+      this.rules = block.tables;
+    } else {
+      this.rules = block.gfm;
+    }
+  }
+}
+
+/**
+ * Expose Block Rules
+ */
+
+Lexer.rules = block;
+
+/**
+ * Static Lex Method
+ */
+
+Lexer.lex = function(src, options) {
+  var lexer = new Lexer(options);
+  return lexer.lex(src);
+};
+
+/**
+ * Preprocessing
+ */
+
+Lexer.prototype.lex = function(src) {
+  src = src
+    .replace(/\r\n|\r/g, '\n')
+    .replace(/\t/g, '    ')
+    .replace(/\u00a0/g, ' ')
+    .replace(/\u2424/g, '\n');
+
+  return this.token(src, true);
+};
+
+/**
+ * Lexing
+ */
+
+Lexer.prototype.token = function(src, top, bq) {
+  var src = src.replace(/^ +$/gm, '')
+    , next
+    , loose
+    , cap
+    , bull
+    , b
+    , item
+    , space
+    , i
+    , l;
+
+  while (src) {
+    // newline
+    if (cap = this.rules.newline.exec(src)) {
+      src = src.substring(cap[0].length);
+      if (cap[0].length > 1) {
+        this.tokens.push({
+          type: 'space'
+        });
+      }
+    }
+
+    // code
+    if (cap = this.rules.code.exec(src)) {
+      src = src.substring(cap[0].length);
+      cap = cap[0].replace(/^ {4}/gm, '');
+      this.tokens.push({
+        type: 'code',
+        text: !this.options.pedantic
+          ? cap.replace(/\n+$/, '')
+          : cap
+      });
+      continue;
+    }
+
+    // fences (gfm)
+    if (cap = this.rules.fences.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'code',
+        lang: cap[2],
+        text: cap[3] || ''
+      });
+      continue;
+    }
+
+    // heading
+    if (cap = this.rules.heading.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'heading',
+        depth: cap[1].length,
+        text: cap[2]
+      });
+      continue;
+    }
+
+    // table no leading pipe (gfm)
+    if (top && (cap = this.rules.nptable.exec(src))) {
+      src = src.substring(cap[0].length);
+
+      item = {
+        type: 'table',
+        header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
+        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+        cells: cap[3].replace(/\n$/, '').split('\n')
+      };
+
+      for (i = 0; i < item.align.length; i++) {
+        if (/^ *-+: *$/.test(item.align[i])) {
+          item.align[i] = 'right';
+        } else if (/^ *:-+: *$/.test(item.align[i])) {
+          item.align[i] = 'center';
+        } else if (/^ *:-+ *$/.test(item.align[i])) {
+          item.align[i] = 'left';
+        } else {
+          item.align[i] = null;
+        }
+      }
+
+      for (i = 0; i < item.cells.length; i++) {
+        item.cells[i] = item.cells[i].split(/ *\| */);
+      }
+
+      this.tokens.push(item);
+
+      continue;
+    }
+
+    // lheading
+    if (cap = this.rules.lheading.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'heading',
+        depth: cap[2] === '=' ? 1 : 2,
+        text: cap[1]
+      });
+      continue;
+    }
+
+    // hr
+    if (cap = this.rules.hr.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'hr'
+      });
+      continue;
+    }
+
+    // blockquote
+    if (cap = this.rules.blockquote.exec(src)) {
+      src = src.substring(cap[0].length);
+
+      this.tokens.push({
+        type: 'blockquote_start'
+      });
+
+      cap = cap[0].replace(/^ *> ?/gm, '');
+
+      // Pass `top` to keep the current
+      // "toplevel" state. This is exactly
+      // how markdown.pl works.
+      this.token(cap, top, true);
+
+      this.tokens.push({
+        type: 'blockquote_end'
+      });
+
+      continue;
+    }
+
+    // list
+    if (cap = this.rules.list.exec(src)) {
+      src = src.substring(cap[0].length);
+      bull = cap[2];
+
+      this.tokens.push({
+        type: 'list_start',
+        ordered: bull.length > 1
+      });
+
+      // Get each top-level item.
+      cap = cap[0].match(this.rules.item);
+
+      next = false;
+      l = cap.length;
+      i = 0;
+
+      for (; i < l; i++) {
+        item = cap[i];
+
+        // Remove the list item's bullet
+        // so it is seen as the next token.
+        space = item.length;
+        item = item.replace(/^ *([*+-]|\d+\.) +/, '');
+
+        // Outdent whatever the
+        // list item contains. Hacky.
+        if (~item.indexOf('\n ')) {
+          space -= item.length;
+          item = !this.options.pedantic
+            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
+            : item.replace(/^ {1,4}/gm, '');
+        }
+
+        // Determine whether the next list item belongs here.
+        // Backpedal if it does not belong in this list.
+        if (this.options.smartLists && i !== l - 1) {
+          b = block.bullet.exec(cap[i + 1])[0];
+          if (bull !== b && !(bull.length > 1 && b.length > 1)) {
+            src = cap.slice(i + 1).join('\n') + src;
+            i = l - 1;
+          }
+        }
+
+        // Determine whether item is loose or not.
+        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+        // for discount behavior.
+        loose = next || /\n\n(?!\s*$)/.test(item);
+        if (i !== l - 1) {
+          next = item.charAt(item.length - 1) === '\n';
+          if (!loose) loose = next;
+        }
+
+        this.tokens.push({
+          type: loose
+            ? 'loose_item_start'
+            : 'list_item_start'
+        });
+
+        // Recurse.
+        this.token(item, false, bq);
+
+        this.tokens.push({
+          type: 'list_item_end'
+        });
+      }
+
+      this.tokens.push({
+        type: 'list_end'
+      });
+
+      continue;
+    }
+
+    // html
+    if (cap = this.rules.html.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: this.options.sanitize
+          ? 'paragraph'
+          : 'html',
+        pre: !this.options.sanitizer
+          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+        text: cap[0]
+      });
+      continue;
+    }
+
+    // def
+    if ((!bq && top) && (cap = this.rules.def.exec(src))) {
+      src = src.substring(cap[0].length);
+      this.tokens.links[cap[1].toLowerCase()] = {
+        href: cap[2],
+        title: cap[3]
+      };
+      continue;
+    }
+
+    // table (gfm)
+    if (top && (cap = this.rules.table.exec(src))) {
+      src = src.substring(cap[0].length);
+
+      item = {
+        type: 'table',
+        header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
+        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+        cells: cap[3].replace(/(?: *\| *)?\n$/, '').split('\n')
+      };
+
+      for (i = 0; i < item.align.length; i++) {
+        if (/^ *-+: *$/.test(item.align[i])) {
+          item.align[i] = 'right';
+        } else if (/^ *:-+: *$/.test(item.align[i])) {
+          item.align[i] = 'center';
+        } else if (/^ *:-+ *$/.test(item.align[i])) {
+          item.align[i] = 'left';
+        } else {
+          item.align[i] = null;
+        }
+      }
+
+      for (i = 0; i < item.cells.length; i++) {
+        item.cells[i] = item.cells[i]
+          .replace(/^ *\| *| *\| *$/g, '')
+          .split(/ *\| */);
+      }
+
+      this.tokens.push(item);
+
+      continue;
+    }
+
+    // top-level paragraph
+    if (top && (cap = this.rules.paragraph.exec(src))) {
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'paragraph',
+        text: cap[1].charAt(cap[1].length - 1) === '\n'
+          ? cap[1].slice(0, -1)
+          : cap[1]
+      });
+      continue;
+    }
+
+    // text
+    if (cap = this.rules.text.exec(src)) {
+      // Top-level should never reach here.
+      src = src.substring(cap[0].length);
+      this.tokens.push({
+        type: 'text',
+        text: cap[0]
+      });
+      continue;
+    }
+
+    if (src) {
+      throw new
+        Error('Infinite loop on byte: ' + src.charCodeAt(0));
+    }
+  }
+
+  return this.tokens;
+};
+
+/**
+ * Inline-Level Grammar
+ */
+
+var inline = {
+  escape: /^\\([\\`*{}\[\]()#+\-.!_>])/,
+  autolink: /^<([^ >]+(@|:\/)[^ >]+)>/,
+  url: noop,
+  tag: /^<!--[\s\S]*?-->|^<\/?\w+(?:"[^"]*"|'[^']*'|[^'">])*?>/,
+  link: /^!?\[(inside)\]\(href\)/,
+  reflink: /^!?\[(inside)\]\s*\[([^\]]*)\]/,
+  nolink: /^!?\[((?:\[[^\]]*\]|[^\[\]])*)\]/,
+  strong: /^__([\s\S]+?)__(?!_)|^\*\*([\s\S]+?)\*\*(?!\*)/,
+  em: /^\b_((?:[^_]|__)+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
+  code: /^(`+)\s*([\s\S]*?[^`])\s*\1(?!`)/,
+  br: /^ {2,}\n(?!\s*$)/,
+  del: noop,
+  text: /^[\s\S]+?(?=[\\<!\[_*`]| {2,}\n|$)/
+};
+
+inline._inside = /(?:\[[^\]]*\]|[^\[\]]|\](?=[^\[]*\]))*/;
+inline._href = /\s*<?([\s\S]*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;
+
+inline.link = replace(inline.link)
+  ('inside', inline._inside)
+  ('href', inline._href)
+  ();
+
+inline.reflink = replace(inline.reflink)
+  ('inside', inline._inside)
+  ();
+
+/**
+ * Normal Inline Grammar
+ */
+
+inline.normal = merge({}, inline);
+
+/**
+ * Pedantic Inline Grammar
+ */
+
+inline.pedantic = merge({}, inline.normal, {
+  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/
+});
+
+/**
+ * GFM Inline Grammar
+ */
+
+inline.gfm = merge({}, inline.normal, {
+  escape: replace(inline.escape)('])', '~|])')(),
+  url: /^(https?:\/\/[^\s<]+[^<.,:;"')\]\s])/,
+  del: /^~~(?=\S)([\s\S]*?\S)~~/,
+  text: replace(inline.text)
+    (']|', '~]|')
+    ('|', '|https?://|')
+    ()
+});
+
+/**
+ * GFM + Line Breaks Inline Grammar
+ */
+
+inline.breaks = merge({}, inline.gfm, {
+  br: replace(inline.br)('{2,}', '*')(),
+  text: replace(inline.gfm.text)('{2,}', '*')()
+});
+
+/**
+ * Inline Lexer & Compiler
+ */
+
+function InlineLexer(links, options) {
+  this.options = options || marked.defaults;
+  this.links = links;
+  this.rules = inline.normal;
+  this.renderer = this.options.renderer || new Renderer;
+  this.renderer.options = this.options;
+
+  if (!this.links) {
+    throw new
+      Error('Tokens array requires a `links` property.');
+  }
+
+  if (this.options.gfm) {
+    if (this.options.breaks) {
+      this.rules = inline.breaks;
+    } else {
+      this.rules = inline.gfm;
+    }
+  } else if (this.options.pedantic) {
+    this.rules = inline.pedantic;
+  }
+}
+
+/**
+ * Expose Inline Rules
+ */
+
+InlineLexer.rules = inline;
+
+/**
+ * Static Lexing/Compiling Method
+ */
+
+InlineLexer.output = function(src, links, options) {
+  var inline = new InlineLexer(links, options);
+  return inline.output(src);
+};
+
+/**
+ * Lexing/Compiling
+ */
+
+InlineLexer.prototype.output = function(src) {
+  var out = ''
+    , link
+    , text
+    , href
+    , cap;
+
+  while (src) {
+    // escape
+    if (cap = this.rules.escape.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += cap[1];
+      continue;
+    }
+
+    // autolink
+    if (cap = this.rules.autolink.exec(src)) {
+      src = src.substring(cap[0].length);
+      if (cap[2] === '@') {
+        text = cap[1].charAt(6) === ':'
+          ? this.mangle(cap[1].substring(7))
+          : this.mangle(cap[1]);
+        href = this.mangle('mailto:') + text;
+      } else {
+        text = escape(cap[1]);
+        href = text;
+      }
+      out += this.renderer.link(href, null, text);
+      continue;
+    }
+
+    // url (gfm)
+    if (!this.inLink && (cap = this.rules.url.exec(src))) {
+      src = src.substring(cap[0].length);
+      text = escape(cap[1]);
+      href = text;
+      out += this.renderer.link(href, null, text);
+      continue;
+    }
+
+    // tag
+    if (cap = this.rules.tag.exec(src)) {
+      if (!this.inLink && /^<a /i.test(cap[0])) {
+        this.inLink = true;
+      } else if (this.inLink && /^<\/a>/i.test(cap[0])) {
+        this.inLink = false;
+      }
+      src = src.substring(cap[0].length);
+      out += this.options.sanitize
+        ? this.options.sanitizer
+          ? this.options.sanitizer(cap[0])
+          : escape(cap[0])
+        : cap[0]
+      continue;
+    }
+
+    // link
+    if (cap = this.rules.link.exec(src)) {
+      src = src.substring(cap[0].length);
+      this.inLink = true;
+      out += this.outputLink(cap, {
+        href: cap[2],
+        title: cap[3]
+      });
+      this.inLink = false;
+      continue;
+    }
+
+    // reflink, nolink
+    if ((cap = this.rules.reflink.exec(src))
+        || (cap = this.rules.nolink.exec(src))) {
+      src = src.substring(cap[0].length);
+      link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+      link = this.links[link.toLowerCase()];
+      if (!link || !link.href) {
+        out += cap[0].charAt(0);
+        src = cap[0].substring(1) + src;
+        continue;
+      }
+      this.inLink = true;
+      out += this.outputLink(cap, link);
+      this.inLink = false;
+      continue;
+    }
+
+    // strong
+    if (cap = this.rules.strong.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.strong(this.output(cap[2] || cap[1]));
+      continue;
+    }
+
+    // em
+    if (cap = this.rules.em.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.em(this.output(cap[2] || cap[1]));
+      continue;
+    }
+
+    // code
+    if (cap = this.rules.code.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.codespan(escape(cap[2], true));
+      continue;
+    }
+
+    // br
+    if (cap = this.rules.br.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.br();
+      continue;
+    }
+
+    // del (gfm)
+    if (cap = this.rules.del.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.del(this.output(cap[1]));
+      continue;
+    }
+
+    // text
+    if (cap = this.rules.text.exec(src)) {
+      src = src.substring(cap[0].length);
+      out += this.renderer.text(escape(this.smartypants(cap[0])));
+      continue;
+    }
+
+    if (src) {
+      throw new
+        Error('Infinite loop on byte: ' + src.charCodeAt(0));
+    }
+  }
+
+  return out;
+};
+
+/**
+ * Compile Link
+ */
+
+InlineLexer.prototype.outputLink = function(cap, link) {
+  var href = escape(link.href)
+    , title = link.title ? escape(link.title) : null;
+
+  return cap[0].charAt(0) !== '!'
+    ? this.renderer.link(href, title, this.output(cap[1]))
+    : this.renderer.image(href, title, escape(cap[1]));
+};
+
+/**
+ * Smartypants Transformations
+ */
+
+InlineLexer.prototype.smartypants = function(text) {
+  if (!this.options.smartypants) return text;
+  return text
+    // em-dashes
+    .replace(/---/g, '\u2014')
+    // en-dashes
+    .replace(/--/g, '\u2013')
+    // opening singles
+    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
+    // closing singles & apostrophes
+    .replace(/'/g, '\u2019')
+    // opening doubles
+    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
+    // closing doubles
+    .replace(/"/g, '\u201d')
+    // ellipses
+    .replace(/\.{3}/g, '\u2026');
+};
+
+/**
+ * Mangle Links
+ */
+
+InlineLexer.prototype.mangle = function(text) {
+  if (!this.options.mangle) return text;
+  var out = ''
+    , l = text.length
+    , i = 0
+    , ch;
+
+  for (; i < l; i++) {
+    ch = text.charCodeAt(i);
+    if (Math.random() > 0.5) {
+      ch = 'x' + ch.toString(16);
+    }
+    out += '&#' + ch + ';';
+  }
+
+  return out;
+};
+
+/**
+ * Renderer
+ */
+
+function Renderer(options) {
+  this.options = options || {};
+}
+
+Renderer.prototype.code = function(code, lang, escaped) {
+  if (this.options.highlight) {
+    var out = this.options.highlight(code, lang);
+    if (out != null && out !== code) {
+      escaped = true;
+      code = out;
+    }
+  }
+
+  if (!lang) {
+    return '<pre><code>'
+      + (escaped ? code : escape(code, true))
+      + '\n</code></pre>';
+  }
+
+  return '<pre><code class="'
+    + this.options.langPrefix
+    + escape(lang, true)
+    + '">'
+    + (escaped ? code : escape(code, true))
+    + '\n</code></pre>\n';
+};
+
+Renderer.prototype.blockquote = function(quote) {
+  return '<blockquote>\n' + quote + '</blockquote>\n';
+};
+
+Renderer.prototype.html = function(html) {
+  return html;
+};
+
+Renderer.prototype.heading = function(text, level, raw) {
+  return '<h'
+    + level
+    + ' id="'
+    + this.options.headerPrefix
+    + raw.toLowerCase().replace(/[^\w]+/g, '-')
+    + '">'
+    + text
+    + '</h'
+    + level
+    + '>\n';
+};
+
+Renderer.prototype.hr = function() {
+  return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+};
+
+Renderer.prototype.list = function(body, ordered) {
+  var type = ordered ? 'ol' : 'ul';
+  return '<' + type + '>\n' + body + '</' + type + '>\n';
+};
+
+Renderer.prototype.listitem = function(text) {
+  return '<li>' + text + '</li>\n';
+};
+
+Renderer.prototype.paragraph = function(text) {
+  return '<p>' + text + '</p>\n';
+};
+
+Renderer.prototype.table = function(header, body) {
+  return '<table>\n'
+    + '<thead>\n'
+    + header
+    + '</thead>\n'
+    + '<tbody>\n'
+    + body
+    + '</tbody>\n'
+    + '</table>\n';
+};
+
+Renderer.prototype.tablerow = function(content) {
+  return '<tr>\n' + content + '</tr>\n';
+};
+
+Renderer.prototype.tablecell = function(content, flags) {
+  var type = flags.header ? 'th' : 'td';
+  var tag = flags.align
+    ? '<' + type + ' style="text-align:' + flags.align + '">'
+    : '<' + type + '>';
+  return tag + content + '</' + type + '>\n';
+};
+
+// span level renderer
+Renderer.prototype.strong = function(text) {
+  return '<strong>' + text + '</strong>';
+};
+
+Renderer.prototype.em = function(text) {
+  return '<em>' + text + '</em>';
+};
+
+Renderer.prototype.codespan = function(text) {
+  return '<code>' + text + '</code>';
+};
+
+Renderer.prototype.br = function() {
+  return this.options.xhtml ? '<br/>' : '<br>';
+};
+
+Renderer.prototype.del = function(text) {
+  return '<del>' + text + '</del>';
+};
+
+Renderer.prototype.link = function(href, title, text) {
+  if (this.options.sanitize) {
+    try {
+      var prot = decodeURIComponent(unescape(href))
+        .replace(/[^\w:]/g, '')
+        .toLowerCase();
+    } catch (e) {
+      return '';
+    }
+    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+      return '';
+    }
+  }
+  var out = '<a href="' + href + '"';
+  if (title) {
+    out += ' title="' + title + '"';
+  }
+  out += '>' + text + '</a>';
+  return out;
+};
+
+Renderer.prototype.image = function(href, title, text) {
+  var out = '<img src="' + href + '" alt="' + text + '"';
+  if (title) {
+    out += ' title="' + title + '"';
+  }
+  out += this.options.xhtml ? '/>' : '>';
+  return out;
+};
+
+Renderer.prototype.text = function(text) {
+  return text;
+};
+
+/**
+ * Parsing & Compiling
+ */
+
+function Parser(options) {
+  this.tokens = [];
+  this.token = null;
+  this.options = options || marked.defaults;
+  this.options.renderer = this.options.renderer || new Renderer;
+  this.renderer = this.options.renderer;
+  this.renderer.options = this.options;
+}
+
+/**
+ * Static Parse Method
+ */
+
+Parser.parse = function(src, options, renderer) {
+  var parser = new Parser(options, renderer);
+  return parser.parse(src);
+};
+
+/**
+ * Parse Loop
+ */
+
+Parser.prototype.parse = function(src) {
+  this.inline = new InlineLexer(src.links, this.options, this.renderer);
+  this.tokens = src.reverse();
+
+  var out = '';
+  while (this.next()) {
+    out += this.tok();
+  }
+
+  return out;
+};
+
+/**
+ * Next Token
+ */
+
+Parser.prototype.next = function() {
+  return this.token = this.tokens.pop();
+};
+
+/**
+ * Preview Next Token
+ */
+
+Parser.prototype.peek = function() {
+  return this.tokens[this.tokens.length - 1] || 0;
+};
+
+/**
+ * Parse Text Tokens
+ */
+
+Parser.prototype.parseText = function() {
+  var body = this.token.text;
+
+  while (this.peek().type === 'text') {
+    body += '\n' + this.next().text;
+  }
+
+  return this.inline.output(body);
+};
+
+/**
+ * Parse Current Token
+ */
+
+Parser.prototype.tok = function() {
+  switch (this.token.type) {
+    case 'space': {
+      return '';
+    }
+    case 'hr': {
+      return this.renderer.hr();
+    }
+    case 'heading': {
+      return this.renderer.heading(
+        this.inline.output(this.token.text),
+        this.token.depth,
+        this.token.text);
+    }
+    case 'code': {
+      return this.renderer.code(this.token.text,
+        this.token.lang,
+        this.token.escaped);
+    }
+    case 'table': {
+      var header = ''
+        , body = ''
+        , i
+        , row
+        , cell
+        , flags
+        , j;
+
+      // header
+      cell = '';
+      for (i = 0; i < this.token.header.length; i++) {
+        flags = { header: true, align: this.token.align[i] };
+        cell += this.renderer.tablecell(
+          this.inline.output(this.token.header[i]),
+          { header: true, align: this.token.align[i] }
+        );
+      }
+      header += this.renderer.tablerow(cell);
+
+      for (i = 0; i < this.token.cells.length; i++) {
+        row = this.token.cells[i];
+
+        cell = '';
+        for (j = 0; j < row.length; j++) {
+          cell += this.renderer.tablecell(
+            this.inline.output(row[j]),
+            { header: false, align: this.token.align[j] }
+          );
+        }
+
+        body += this.renderer.tablerow(cell);
+      }
+      return this.renderer.table(header, body);
+    }
+    case 'blockquote_start': {
+      var body = '';
+
+      while (this.next().type !== 'blockquote_end') {
+        body += this.tok();
+      }
+
+      return this.renderer.blockquote(body);
+    }
+    case 'list_start': {
+      var body = ''
+        , ordered = this.token.ordered;
+
+      while (this.next().type !== 'list_end') {
+        body += this.tok();
+      }
+
+      return this.renderer.list(body, ordered);
+    }
+    case 'list_item_start': {
+      var body = '';
+
+      while (this.next().type !== 'list_item_end') {
+        body += this.token.type === 'text'
+          ? this.parseText()
+          : this.tok();
+      }
+
+      return this.renderer.listitem(body);
+    }
+    case 'loose_item_start': {
+      var body = '';
+
+      while (this.next().type !== 'list_item_end') {
+        body += this.tok();
+      }
+
+      return this.renderer.listitem(body);
+    }
+    case 'html': {
+      var html = !this.token.pre && !this.options.pedantic
+        ? this.inline.output(this.token.text)
+        : this.token.text;
+      return this.renderer.html(html);
+    }
+    case 'paragraph': {
+      return this.renderer.paragraph(this.inline.output(this.token.text));
+    }
+    case 'text': {
+      return this.renderer.paragraph(this.parseText());
+    }
+  }
+};
+
+/**
+ * Helpers
+ */
+
+function escape(html, encode) {
+  return html
+    .replace(!encode ? /&(?!#?\w+;)/g : /&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#39;');
+}
+
+function unescape(html) {
+	// explicitly match decimal, hex, and named HTML entities 
+  return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/g, function(_, n) {
+    n = n.toLowerCase();
+    if (n === 'colon') return ':';
+    if (n.charAt(0) === '#') {
+      return n.charAt(1) === 'x'
+        ? String.fromCharCode(parseInt(n.substring(2), 16))
+        : String.fromCharCode(+n.substring(1));
+    }
+    return '';
+  });
+}
+
+function replace(regex, opt) {
+  regex = regex.source;
+  opt = opt || '';
+  return function self(name, val) {
+    if (!name) return new RegExp(regex, opt);
+    val = val.source || val;
+    val = val.replace(/(^|[^\[])\^/g, '$1');
+    regex = regex.replace(name, val);
+    return self;
+  };
+}
+
+function noop() {}
+noop.exec = noop;
+
+function merge(obj) {
+  var i = 1
+    , target
+    , key;
+
+  for (; i < arguments.length; i++) {
+    target = arguments[i];
+    for (key in target) {
+      if (Object.prototype.hasOwnProperty.call(target, key)) {
+        obj[key] = target[key];
+      }
+    }
+  }
+
+  return obj;
+}
+
+
+/**
+ * Marked
+ */
+
+function marked(src, opt, callback) {
+  if (callback || typeof opt === 'function') {
+    if (!callback) {
+      callback = opt;
+      opt = null;
+    }
+
+    opt = merge({}, marked.defaults, opt || {});
+
+    var highlight = opt.highlight
+      , tokens
+      , pending
+      , i = 0;
+
+    try {
+      tokens = Lexer.lex(src, opt)
+    } catch (e) {
+      return callback(e);
+    }
+
+    pending = tokens.length;
+
+    var done = function(err) {
+      if (err) {
+        opt.highlight = highlight;
+        return callback(err);
+      }
+
+      var out;
+
+      try {
+        out = Parser.parse(tokens, opt);
+      } catch (e) {
+        err = e;
+      }
+
+      opt.highlight = highlight;
+
+      return err
+        ? callback(err)
+        : callback(null, out);
+    };
+
+    if (!highlight || highlight.length < 3) {
+      return done();
+    }
+
+    delete opt.highlight;
+
+    if (!pending) return done();
+
+    for (; i < tokens.length; i++) {
+      (function(token) {
+        if (token.type !== 'code') {
+          return --pending || done();
+        }
+        return highlight(token.text, token.lang, function(err, code) {
+          if (err) return done(err);
+          if (code == null || code === token.text) {
+            return --pending || done();
+          }
+          token.text = code;
+          token.escaped = true;
+          --pending || done();
+        });
+      })(tokens[i]);
+    }
+
+    return;
+  }
+  try {
+    if (opt) opt = merge({}, marked.defaults, opt);
+    return Parser.parse(Lexer.lex(src, opt), opt);
+  } catch (e) {
+    e.message += '\nPlease report this to https://github.com/chjj/marked.';
+    if ((opt || marked.defaults).silent) {
+      return '<p>An error occured:</p><pre>'
+        + escape(e.message + '', true)
+        + '</pre>';
+    }
+    throw e;
+  }
+}
+
+/**
+ * Options
+ */
+
+marked.options =
+marked.setOptions = function(opt) {
+  merge(marked.defaults, opt);
+  return marked;
+};
+
+marked.defaults = {
+  gfm: true,
+  tables: true,
+  breaks: false,
+  pedantic: false,
+  sanitize: false,
+  sanitizer: null,
+  mangle: true,
+  smartLists: false,
+  silent: false,
+  highlight: null,
+  langPrefix: 'lang-',
+  smartypants: false,
+  headerPrefix: '',
+  renderer: new Renderer,
+  xhtml: false
+};
+
+/**
+ * Expose
+ */
+
+marked.Parser = Parser;
+marked.parser = Parser.parse;
+
+marked.Renderer = Renderer;
+
+marked.Lexer = Lexer;
+marked.lexer = Lexer.lex;
+
+marked.InlineLexer = InlineLexer;
+marked.inlineLexer = InlineLexer.output;
+
+marked.parse = marked;
+
+if (typeof module !== 'undefined' && typeof exports === 'object') {
+  module.exports = marked;
+} else if (typeof define === 'function' && define.amd) {
+  define(function() { return marked; });
+} else {
+  this.marked = marked;
+}
+
+}).call(function() {
+  return this || (typeof window !== 'undefined' ? window : global);
+}());

programming_language: JavaScript
filename: runMathJax.js
change_type: ModificationType.MODIFY
diff: @@ -11,6 +11,7 @@
 
         window.MathJax.Hub.Register.StartupHook("End Typeset",
             function () {
+                config.markedOptions.sanitize = false;
                 marked.setOptions(config.markedOptions);
 
                 // Decode &lt; and &gt;

programming_language: JavaScript
filename: manifest.json
change_type: ModificationType.MODIFY
diff: @@ -1,6 +1,6 @@
 {
   "name": "Markdown Preview Plus",
-  "version": "0.5.6",
+  "version": "0.5.7",
   "manifest_version": 2,
 
   "description": "Converts and previews markdown files (.md, .markdown) to HTML right inside Chrome.",

programming_language: JavaScript
filename: test_latin.markdown
change_type: ModificationType.MODIFY
diff: @@ -1,2 +1,3 @@
 ñ Ñ á é í ó ú 
 
+你好

programming_language: Markdown