HTB22863: XSS vulnerability in xtcModified

Vulnerability ID: HTB22863
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_xtcmodified.html
Product: xtcModified
Vendor: xtcModified Team ( http://www.xtc-modified.org/ )
Vulnerable Version: 1.05 and probably prior versions
Vendor Notification: 17 February 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 "admin/categories.php" script to properly sanitize user-supplied input in "search" variable. 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:
http://host/admin/categories.php?search=prod"><script>alert(document.cookie)</script>