What’s Vulnerable › Vulnerabilities

CVE-2026-77607: Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-23
• Weakness: CWE-79

Description

Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Prior to version 7.2.0, `sep` was inserted verbatim into HTML cell joins. This made it possible to inject HTML through the separator value. Version 7.2.0 fixes the issue.

Affected products

• SemanticMediaWiki: before 7.2.0

References

• https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-7xv3-gf2g-498h

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