What’s Vulnerable › Vulnerabilities

CVE-2026-116888: SemanticMediaWiki 3.2.0 before 7.3.1 Stored XSS via Special:Browse Group Heading

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-27 · updated 2026-10-31
• Weakness: CWE-79

Description

SemanticMediaWiki from 3.2.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with the smw-schemaedit right to inject markup through an unescaped property group schema canonical_name. Attackers can save a schema whose canonical_name holds script markup, which GroupFormatter renders unescaped in Special:Browse headings, executing JavaScript in viewers' sessions including administrators.

Affected products

• Semantic-Mediawiki Semantic Mediawiki: from 3.2.0 before 7.3.1 — fixed in 7.3.1
• SemanticMediaWiki: from 3.2.0 before 7.3.1 — fixed in 7.3.1

How to fix

Upgrade to a fixed version: Semantic-Mediawiki Semantic Mediawiki 7.3.1; SemanticMediaWiki 7.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-fp94-c5vh-cmhp
• https://www.vulncheck.com/advisories/semanticmediawiki-3.2.0-before-7.3.1-stored-xss-via-special-browse-group-heading
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-fp94-c5vh-cmhp

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