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CVE-2026-116891

Semantic-mediawiki Semantic Mediawiki: cross-site scripting

Risk score
42/100
CVSS
6.1 v3.1
Published
27 Oct 2026

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What to know

What it is
SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject HTML via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft URLs with q, a matching crc32 csum or filtered=1, and cstate values that break out of hidd…
Affected
Semantic-mediawiki Semantic Mediawiki before 7.2.1
Fix
Upgrade Semantic-mediawiki Semantic Mediawiki to 7.2.1 or later.
Exploitation
Public proof of concept

Story map

Story map: Semantic-mediawiki Semantic MediawikiTHE FLAWSTHE FIXCVE-2026-116891Cross-site scriptingCVSS 6.1CVE-2026-116874Cross-site scriptingCVSS 6.1CVE-2026-116875Cross-site scriptingCVSS 6.1CVE-2026-116884Cross-site scriptingCVSS 6.1Upgrade…7.2.1 · 7.3.1or later on your release lineWho is exposedSemantic-mediawiki SemanticMediawiki before 7.2.1YELLOW · PLAN IT INSemantic-mediawiki Semantic…SemanticMediaWiki from 4.2.0before 7.2.1 contains a reflectedcross-site scriptingvulnerability that allowsunauthenticated attackers toinject HTML via unescapedcstate parameters in…Where it standsPublic proof of conceptCONNECTS TOSame weaknessCross-site scripting (CWE-79)396 other warnings in 30 days →Same productEarlier Semantic-mediawiki Semantic Mediawikiwarnings3 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Semantic-mediawiki Semantic Mediawiki: Yellow, plan it in. SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject HTML via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft URLs with q, a matching crc32 csum or filtered=1, and cstate values that break out of hidd…

The flaws

The fix

Upgrade Semantic-mediawiki Semantic Mediawiki: 7.2.1 · 7.3.1 or later on your release line

Who is exposed: Semantic-mediawiki Semantic Mediawiki before 7.2.1

Where it stands

  • Public proof of concept

Connects to

Why it is Yellow

  • CVSS 6.1 medium
  • Public exploit or proof of concept referenced

References

Original description

SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject HTML via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft URLs with q, a matching crc32 csum or filtered=1, and cstate values that break out of hidden input attributes to execute script in victims' browsers.

Last activity 27 Oct 2026. Patch Forecast updates every hour.