Patch Forecast
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CVE-2026-116889

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 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Br…
Affected
Semantic-mediawiki Semantic Mediawiki before 7.3.1
Fix
Upgrade Semantic-mediawiki Semantic Mediawiki to 7.3.1 or later.
Exploitation
Public proof of concept

Story map

Story map: Semantic-mediawiki Semantic MediawikiTHE FLAWSTHE FIXCVE-2026-116889Cross-site scriptingCVSS 6.1CVE-2026-116874Cross-site scriptingCVSS 6.1CVE-2026-116875Cross-site scriptingCVSS 6.1CVE-2026-116884Cross-site scriptingCVSS 6.1Upgrade…7.3.1or later on your release lineWho is exposedSemantic-mediawiki SemanticMediawiki before 7.3.1YELLOW · PLAN IT INSemantic-mediawiki Semantic…SemanticMediaWiki from 2.5.0before 7.3.1 contains a storedcross-site scriptingvulnerability that allows userswith page-edit rights to injectscript through Code-typedproperty values. Attackers can…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 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Br…

The flaws

The fix

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

Who is exposed: Semantic-mediawiki Semantic Mediawiki before 7.3.1

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 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Browse, executing JavaScript in viewers' sessions.

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