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Medium · 6.1 CVE-2026-77606 EUVD-2026-83171GHSA-3jp5-3h47-28qf

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

Published Sep 18, 2026 · Updated Sep 22, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
SemanticMediaWiki SemanticMediaWiki < 7.2.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist mediawiki/semantic-media-wiki < 7.2.0 7.2.0 GHSA-3jp5-3h47-28qf

References