CVE-2026-116886

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2gfw-3hj2-wfq5	Exploit Vendor Advisory
https://www.vulncheck.com/advisories/semantic-mediawiki-before-7.3.1-stored-xss-via-external-identifier-in-special-browse	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:*:*:*:*:*:mediawiki:*:*

History

03 Nov 2026, 16:42

Type	Values Removed	Values Added
First Time		Semantic-mediawiki semantic Mediawiki Semantic-mediawiki
CPE		cpe:2.3:a:semantic-mediawiki:semantic_mediawiki::::::mediawiki::*
References	~~() https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2gfw-3hj2-wfq5 -~~	() https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2gfw-3hj2-wfq5 - Exploit, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/semantic-mediawiki-before-7.3.1-stored-xss-via-external-identifier-in-special-browse -~~	() https://www.vulncheck.com/advisories/semantic-mediawiki-before-7.3.1-stored-xss-via-external-identifier-in-special-browse - Third Party Advisory

27 Oct 2026, 11:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-27 11:17

Updated : 2026-11-03 16:42

NVD link : CVE-2026-116886

Mitre link : CVE-2026-116886

CVE.ORG link : CVE-2026-116886

JSON object : View

Products Affected

semantic-mediawiki

semantic_mediawiki

CWE

CWE-79

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

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