CVE-2026-77606

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

Published Sep 18, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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, 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-3jp5-3h47-28qf Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Semantic-mediawiki
Semantic-mediawiki semantic Mediawiki
Vendors & Products Semantic-mediawiki
Semantic-mediawiki semantic Mediawiki
Type Values Removed Values Added
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, 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.
Title Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 22, 2026, 2:59 PM
Reserved
Aug 20, 2026, 8:48 PM
Status
Awaiting Analysis
Published
Sep 18, 2026, 5:17 PM
Modified
Sep 24, 2026, 9:22 PM