CVE-2026-77606

MEDIUM 6.1

Semantic MediaWiki has reflected XSS in Special:Ask plain table headers

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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, when `headers=plain`, table header text was emitted into `<th>` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML. Version 7.2.0 fixes the issue.

CWE	CWE-79
Vendor	semanticmediawiki
Product	semanticmediawiki
Published	Sep 18, 2026

Stay Ahead of the Next One

Get instant alerts for semanticmediawiki semanticmediawiki

Be the first to know when new medium vulnerabilities affecting semanticmediawiki semanticmediawiki are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

SemanticMediaWiki / SemanticMediaWiki

< 7.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3jp5-3h47-28qf github.com: https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0