CVE-2026-116886

Semantic MediaWiki before 7.3.1 Stored XSS via External Identifier in Special:Browse

State: Published
Severity: 5.3 Medium
Published: Oct 27, 2026
Updated: Oct 27, 2026
Reserved: Oct 27, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
SemanticMediaWikiSemanticMediaWiki	2.5.0 to before 7.3.1Affected 7.3.1Not affected

References

GitHub Security Advisory (GHSA-2gfw-3hj2-wfq5)vendor-advisory
VulnCheck Advisory: Semantic MediaWiki before 7.3.1 Stored XSS via External Identifier in Special:Browsethird-party-advisory

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