CVE-2026-116883

MediumCVSS 4.8/10Last modified Nov 4, 2026

Description

Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated schema editors to inject HTML through schema descriptions. Attackers with the smw-schemaedit permission can save HTML that is passed unescaped to Html::rawElement() in HtmlBuilder, altering pages and targeting users who view the schema.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
SemanticMediaWiki	SemanticMediaWiki	>= 3.1.0, < 7.3.1

References

https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2xr9-cr6h-wr6mExploit, Mitigation, Vendor Advisory
https://www.vulncheck.com/advisories/semantic-mediawiki-3.1.0-before-7.3.1-stored-xss-via-schema-descriptionsThird Party Advisory
https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2xr9-cr6h-wr6mExploit, Mitigation, Vendor Advisory

Timeline

Published: Oct 27, 2026
Last modified: Nov 4, 2026
NVD status: Modified

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