[ CVE-2026-116886 · Published 27 Oct 2026 ]

Vulnerability in SemanticMediaWiki

CVSS 5.4 EPSS <1%No fix listed yet

[ Description ]Official description

Semantic MediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject scripts via External identifier property values. Attackers can annotate markup payloads that ExternalIdentifierValue renders unescaped on Special:Browse, executing JavaScript in viewers' sessions, including administrators.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2gfw-3hj2-wfq5ExploitVendor Advisory
www.vulncheck.com/advisories/semantic-mediawiki-before-7.3.1-stored-xss-via-external-id…Third Party Advisory