Cross-site Scripting Vulnerability in Wikimedia Foundation's Vector

CVE-2025-61657

What is CVE-2025-61657?

A Cross-site Scripting (XSS) vulnerability exists in the Wikimedia Foundation's Vector product, specifically affecting versions prior to 1.43.4 and 1.44.1. This vulnerability arises from improper input handling during the web page generation process, allowing malicious users to inject arbitrary scripts into web pages viewed by other users. This can lead to unauthorized actions being performed on behalf of users, data theft, and other security risks. The affected code resides in the stickyHeader.js file associated with the Vector skin. Organizations using these versions should take immediate steps to upgrade to secure versions to mitigate potential attacks.

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References