Vulnerability ID: HTB22822 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_runcms.html Product: RunCMS Vendor: http://www.runcms.org/ ( http://www.runcms.org/ ) Vulnerable Version: 2.2.2 Vendor Notification: 27 January 2011 Vulnerability Type: XSS (Cross Site Scripting) Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application. The vulnerability exists due to failure in the "/user.php" script to properly sanitize user-supplied input in "rc2_user" variable from cookies. 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: GET /user.php HTTP/1.1 Cookie: rc2_user='><script>alert("XSS")%3b</script>