Medium · CVSS 4.8CVE-2026-116882

Semantic MediaWiki 4.2.0 before 7.3.1 Stored XSS via FacetedSearch Exploration LabelsCVE-2026-116882

Answer in brief

CVE-2026-116882 records a Medium severity (CVSS 4.8) vulnerability in Semantic MediaWiki 4.2.0 before 7.3.1 Stored XSS via FacetedSearch Exploration Labels. The current sources do not mark it as known exploited. The current feed maps SemanticMediaWiki/SemanticMediaWiki (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 4.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SemanticMediaWiki/SemanticMediaWiki (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SemanticMediaWiki/SemanticMediaWikigeneric	>=4.2.0 <7.3.1	7.3.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for SemanticMediaWiki/SemanticMediaWiki.
Review the reported fix. Update SemanticMediaWiki/SemanticMediaWiki to 7.3.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 27, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.