Vulnerability · Published Jan 17, 2025 · Assigned by GitHub_M

CVE-2025-23207\htmlData does not validate attribute names in KaTeX

Medium 6.3

In plain English

A medium-severity security flaw in KaTeX from KaTeX. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.4%top 64.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions with `renderToString` could encounter malicious input using `\htmlData` that runs arbitrary JavaScript, or generate invalid HTML. Users are advised to upgrade to KaTeX v0.16.21 to remove this vulnerability. Users unable to upgrade should avoid use of or turn off the `trust` option, or set it to forbid `\htmlData` commands, forbid inputs containing the substring `"\\htmlData"` and sanitize HTML output from KaTeX.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	node-katex	no fix listed	DEBIAN-CVE-2025-23207
Debian:13	node-katex	no fix listed	DEBIAN-CVE-2025-23207
Debian:14	node-katex	0.16.10+~cs6.1.0-7	DEBIAN-CVE-2025-23207
Ubuntu:25.10	node-katex	0.16.10+~cs6.1.0-2ubuntu1	UBUNTU-CVE-2025-23207
Ubuntu:26.04:LTS	node-katex	0.16.10+~cs6.1.0-2ubuntu1	UBUNTU-CVE-2025-23207
npm	katex	0.16.21	GHSA-cg87-wmx4-v546

Affected products (as reported)

Vendor	Product	Versions
KaTeX	KaTeX	>= 0.12.0, < 0.16.21

Weakness: CWE-116 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References

https://github.com/KaTeX/KaTeX/security/advisories/GHSA-cg87-wmx4-v546 x_refsource_CONFIRM
https://github.com/KaTeX/KaTeX/commit/ff289955e81aab89086eef09254cbf88573d415c x_refsource_MISC