CVE-2025-66400
CVE-2025-66400 · mdast-util-to-hast unsanitized class attribute
This page contains facts from public vulnerability sources. Check the original advisory before updating.
mdast-util-to-hast is an mdast utility to transform to hast. From 13.0.0 to before 13.2.1, multiple (unprefixed) classnames could be added in markdown source by using character references. This could make rendered user supplied markdown code elements appear like the rest of the page. This vulnerability is fixed in 13.2.1.
CVSS 6.9 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
mdast-util-to-hast
- Versions
- >= 13.0.0, < 13.2.1: Affected
No fix published
mdast-util-to-hast npm
- Affected ranges
- SEMVER: ≥ 13.0.0, < 13.2.1
Update to 13.2.1
Original sources
- https://github.com/syntax-tree/mdast-util-to-hast/security/advisories/GHSA-4fh9-h7wg-q85m
- https://github.com/syntax-tree/mdast-util-to-hast/commit/6fc783ae6abdeb798fd5a68e7f3f21411dde7403
- https://github.com/syntax-tree/mdast-util-to-hast/commit/ab3a79570a1afbfa7efef5d4a0cd9b5caafbc5d7
- https://nvd.nist.gov/vuln/detail/CVE-2025-66400