Cross-site Scripting in markdown-it-highlightjs
This affects the package markdown-it-highlightjs before 3.3.1. It is possible insert malicious JavaScript as a value of lang in the markdown-it-highlightjs Inline code highlighting feature.
const markdownItHighlightjs = require("markdown-it-highlightjs");
const md = require('markdown-it');
const reuslt_xss = md().use(markdownItHighlightjs, { inline: true }).render('console.log(42){.">js}');
console.log(reuslt_xss);Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | markdown-it-highlightjs | < 3.3.1 | 3.3.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
markdown-it-highlightjs- Disclosed
- 10.02.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-f246-xrrj-g8j6 - CC BY 4.0
Vulnerability history: markdown-it-highlightjs
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.
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