What’s Vulnerable › Vulnerabilities

CVE-2026-116875: SemanticMediaWiki 3.0.0 before 7.3.1 Reflected XSS via Special:Ask Separator Parameters

• 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 3.0.0 before 7.3.1 contains a reflected cross-site scripting vulnerability in Special:Ask, which outputs separator parameters (sep, propsep, valuesep, delim, separator) without HTML escaping in list, category, DSV, and CSV result printers. Unauthenticated attackers can send victims crafted Special:Ask links using request_type=raw or request_type=special_page to execute JavaScript in the wiki's origin, stealing sessions or CSRF tokens.

Affected products

• Semantic-Mediawiki Semantic Mediawiki: from 3.0.0 before 7.3.1 — fixed in 7.3.1
• SemanticMediaWiki: from 3.0.0 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-3v2c-r7rx-frc8
• https://www.vulncheck.com/advisories/semanticmediawiki-3.0.0-before-7.3.1-reflected-xss-via-special-ask-separator-parameters

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