CVE-2025-53093: Starcitizentools Mediawiki-Extensions-Tabberneue

High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days.

TabberNeue is a MediaWiki extension that allows the wiki to create tabs. Starting in version 3.0.0 and prior to version 3.1.1, any user can insert arbitrary HTMLinto the DOM by inserting a payload into any allowed attribute of the `<tabber>` tag. Version 3.1.1 contains a patch for the bug.

Affected products

• Starcitizentools Mediawiki-Extensions-Tabberneue: from 3.0.0, before 3.1.1 (fixed in 3.1.1)

Published 2025-06-27. Last modified 2026-06-17.