Medium severity · published Oct 27, 2026
CVE-2026-116882
Semantic MediaWiki 4.2.0 before 7.3.1 Stored XSS via FacetedSearch Exploration Labels
New
4.8
CVSS
–
EPSS
No
On KEV
Description
Semantic MediaWiki from 4.2.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated profile or schema editors to inject HTML through FacetedSearch exploration-link labels. Attackers can store markup in the label, which ExploreListBuilder::buildHTML() passes unescaped to Html::rawElement(), altering the Special:FacetedSearch page and potentially running scripts in viewers' browsers.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
SemanticMediaWiki · SemanticMediaWiki
4.2.0 before 7.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116882
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116882
github.com
https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3r5m-693w-jm33
www.vulncheck.com
https://www.vulncheck.com/advisories/semantic-mediawiki-4.2.0-before-7.3.1-stored-xss-via-facetedsearch-exploration-labels
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