Medium 4.8Published Oct 27, 2026

CVE-2026-116883Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via Schema Descriptions

Updated under an hour ago (Oct 29, 2026, 2:10 PM ET)

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It affects SemanticMediaWiki. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 27, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

SemanticMediaWiki SemanticMediaWiki semanticmediawiki:semanticmediawiki (from the name)	from 3.1.0 before 7.3.1; 7.3.1 not affected	CNA record

References

References

https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2xr9-cr6h-wr6m	vendor-advisory
https://www.vulncheck.com/advisories/semantic-mediawiki-3.1.0-before-7.3.1-stored-xss-via-schema-descriptions	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.