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.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.