CVE-2026-116882

Semantic MediaWiki 4.2.0 before 7.3.1 Stored XSS via FacetedSearch Exploration Labels

MEDIUM
4.8
CVSS Score
Published: October 27, 2026 at 10:23 AM UTC
Updated: October 27, 2026 at 03:06 PM UTC
1 product affected across 1 vendorSemantic MediaWiki

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 7.3.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMVulnCheck
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-79

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