Wikimedia MediaWiki TwoColConflict Extension Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Wikimedia Foundation MediaWiki TwoColConflict Extension, affecting versions 1.39.X prior to 1.39.13, 1.42.X prior to 1.42.7, and 1.43.X prior to 1.43.2. This vulnerability arises from improper neutralization of input during web page generation, allowing malicious scripts to be injected and stored.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user.