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CVE-2026-100243

Stored XSS in WikiSEO author and image properties on action=info

Wikimedia Foundation Mediawiki - WikiSEO ExtensionApplications & CMS
Open in ThreatlineRecord JSON
CVSS
6.1Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.46.1, 1.45.5, 1.43.10Fixed versionCVE List
Published29 Sep 2026Updated 30 Sep 2026CVE List

What fixes it

  • 1.46.1, 1.45.5, 1.43.10Mediawiki - WikiSEO ExtensionCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.

This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Text from CVE List

Affected versions 1

  • Mediawiki - WikiSEO Extensionaffected: * before 1.46.1, 1.45.5, 1.43.10CVE List

References 2