Product: CLASSIFIED ADS Vendor: http://www.got.my ( http://www.got.my/CLASSIFIED-ADS/ ) Vulnerable Version: 2.9.1 Vulnerability Type: XSS (Cross Site Scripting) Risk level: Medium Credit: Hector.x90 Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application. The vulnerability exists due to failure in the "/themes/default/header.inc.php" script to properly sanitize user-supplied input in "theme_dir" variable then register_globals on. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data. The following PoC is available: http://[host]/themes/default/header.inc.php?theme_dir=%22%3E%3Cscript%3E alert%28document.cookie%29;%3C/script%3E