GHSA-m7qm-r2r5-f77q: React marked markdown Cross-Site Scripting Vulnerability

HIGH
Share
CWE-79
Published
Advisory Summary

GHSA-m7qm-r2r5-f77q is a HIGH cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting React marked markdown libraries in the npm ecosystem. The issue involves cross-site scripting in react-marked-markdown. Remediation is available in the latest vendor maintenance releases.

GHSA-m7qm-r2r5-f77q at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-m7qm-r2r5-f77q
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product React marked markdown
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-m7qm-r2r5-f77q

To remediate this vulnerability, upgrade all affected React marked markdown dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

react-marked-markdown fixed: Latest secure release 
npm install react-marked-markdown@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls react-marked-markdown

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-m7qm-r2r5-f77q, inspect your project dependencies using npm:

npm ls react-marked-markdown

Analyze the terminal output to locate any version of React marked markdown in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls react-marked-markdown command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where 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. In React marked markdown, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions of `react-marked-markdown` are vulnerable to cross-site scripting (XSS) via `href` attributes. This is exploitable if user is provided to `react-marked-markdown` Proof of concept: ``` import React from 'react' import ReactDOM from 'react-dom' import { MarkdownPreview } from 'react-marked-markdown' ReactDOM.render( <MarkdownPreview markedOptions={{ sanitize: true }} value={'[XSS](javascript: alert`1`)'} />, document.getElementById('root') ) ``` ## Recommendation No fix is currently available for this vulnerability. It is our recommendation to not install or use this module at this time if you allow user input into href values.

GHSA-m7qm-r2r5-f77q Affected React marked markdown Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
react-marked-markdown
npm/react-marked-markdown
npm
≥ 0.0.0

References

React marked markdown Source Repository REPOSITORY
https://github.com/Vincent-P/react-marked-markdown/issues/61
hackerone.com/reports/344069 WEB
https://hackerone.com/reports/344069
React marked markdown Source Repository REPOSITORY
https://github.com/Vincent-P/react-marked-markdown
www.npmjs.com/advisories/668 WEB
https://www.npmjs.com/advisories/668

Frequently Asked Questions

What is GHSA-m7qm-r2r5-f77q?
GHSA-m7qm-r2r5-f77q is a security vulnerability in React marked markdown involving Cross-Site Scripting in react-marked-markdown under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which React marked markdown versions are affected?
Affected versions include releases prior to current release patches across affected packages: react-marked-markdown.
What version fixes GHSA-m7qm-r2r5-f77q?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is react-marked-markdown affected?
Yes, react-marked-markdown is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-m7qm-r2r5-f77q?
GHSA-m7qm-r2r5-f77q is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (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.).
How can I check npm dependencies for GHSA-m7qm-r2r5-f77q?
Run the dependency tree command: 'npm ls react-marked-markdown'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m7qm-r2r5-f77q",
  "modified" : "2021-09-24T20:35:29Z",
  "published" : "2020-09-01T20:43:48Z",
  "aliases" : [ ],
  "summary" : "Cross-Site Scripting in react-marked-markdown",
  "details" : "All versions of `react-marked-markdown` are vulnerable to cross-site scripting (XSS) via `href` attributes. This is exploitable if user is provided to `react-marked-markdown`\n\nProof of concept:\n\n```\nimport React from 'react'\nimport ReactDOM from 'react-dom'\nimport { MarkdownPreview } from 'react-marked-markdown'\n\nReactDOM.render(\n<MarkdownPreview\nmarkedOptions={{ sanitize: true }}\nvalue={'[XSS](javascript: alert`1`)'}\n/>,\ndocument.getElementById('root')\n)\n```\n\n\n## Recommendation\n\nNo fix is currently available for this vulnerability. It is our recommendation to not install or use this module at this time if you allow user input into href values.\n",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "react-marked-markdown"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Vincent-P/react-marked-markdown/issues/61"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/344069"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Vincent-P/react-marked-markdown"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/668"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:32:03Z",
    "nvd_published_at" : null
  }
}