A vulnerability exists in the errorpage.php file of the CS2-WeaponPaints-Website v2.1.7 where user-controlled input is not adequately validated before being processed. Specifically, the $_GET['errorcode'] parameter can be manipulated to access unauthorized error codes, leading to Cross-Site Scripting (XSS) attacks and information disclosure.
https://github.com/J4cky1028/vulnerability-research/tree/main/CVE-2025-29594