Vulnerability ID: HTB22446 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_cruxcms_1.html Product: CruxCMS Vendor: CruxSoftware Vulnerable Version: 3.00 and Probably Prior Versions Vendor Notification: 21 June 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response 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 "/login.php" script to properly sanitize user-supplied input in "txtusername" POST parameter. 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. An attacker can use browser to exploit this vulnerability. The following PoC is available: <form method="POST" action="http://host/manager/login.php" name="main"> <input type=hidden name=txtusername value='"><script>alert(document.cookie)</script>'> <input type=hidden name=txtpassword value=''> <input type=hidden name=cmdSubmit value='Submit'> </form> <script> document.main.submit(); </script>