Medium severity6.1NVD Advisory· Published Nov 11, 2026
CVE-2026-126563
CVE-2026-126563
Description
Semantic MediaWiki 2.4.0 before 7.4.1 contains a reflected cross-site scripting vulnerability in TimeValueFormatter::getCaptionFromFreeFormat(), which emits free-format date captions in HTML without escaping. Unauthenticated attackers can craft a Special:Ask URL with HTML markup in a date printout format (#-F[...]) to execute script in a logged-in victim's browser session.
Affected products
1- Range: <7.4.1
Patches
Vulnerability mechanics
References
5- github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/DataValues/ValueFormatters/TimeValueFormatter.phpnvd
- github.com/SemanticMediaWiki/SemanticMediaWiki/commit/01cb81a6da7af743d2a5eb334db10e52b7318c56nvd
- github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1nvd
- github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-h252-mj7p-58q7nvd
- www.vulncheck.com/advisories/semantic-mediawiki-2.4.0-before-7.4.1-reflected-xss-via-special-ask-date-formatnvd
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