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

Date Sep 18, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Composer ยท mediawiki/semantic-media-wiki
CVE CVE-2025-61682
High-risk advisory CVE-2025-61682

Summary

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

Why it matters

GitHub has published a reviewed security advisory for mediawiki/semantic-media-wiki. Prioritize it with other application dependency updates, especially because EPSS places it in the 22% percentile.

Operator check

Check whether mediawiki/semantic-media-wiki is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.3%; percentile: 22%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.