Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2025-61682Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

High 8.6

In plain English

A high-severity cross-site scripting in SemanticMediaWiki from SemanticMediaWiki. Proof-of-concept exploit code is public. 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)8.6High

Exploit odds (30 days)0.4%top 65.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	mediawiki/semantic-media-wiki	7.0.0	GHSA-hg8h-557g-q8pp

Affected products (as reported)

Vendor	Product	Versions
SemanticMediaWiki	SemanticMediaWiki	>= 3.1.0, < 7.0.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

References

https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-hg8h-557g-q8pp x_refsource_CONFIRM
https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.0.0 x_refsource_MISC