What’s Vulnerable › Vulnerabilities

CVE-2026-116889: SemanticMediaWiki 2.5.0 before 7.3.1 Stored XSS via Special:Browse Code Property

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-27 · updated 2026-10-28
• Weakness: CWE-79

Description

SemanticMediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Browse, executing JavaScript in viewers' sessions.

Affected products

• Semantic-Mediawiki Semantic Mediawiki: from 2.5.0 before 7.3.1 — fixed in 7.3.1
• SemanticMediaWiki: from 2.5.0 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-6v7f-crgp-hhvp
• https://www.vulncheck.com/advisories/semanticmediawiki-2.5.0-before-7.3.1-stored-xss-via-special-browse-code-property

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