CVE-2025-21612

Summary

CVE-2025-21612 is a MediaWiki vulnerability affecting the TabberNeue extension, specifically versions prior to 2.7.2. The TabberTransclude.php component fails to properly escape user-supplied page names, allowing an attacker to inject malicious XSS (Cross-Site Scripting) code when outputting the page name. This issue poses a significant risk, as successful exploitation could lead to unauthorized script execution and potential data theft or site takeover. The vulnerability is remedied in the updated version 2.7.2.

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