HTB22831: XSS vulnerability in Gollos

Vulnerability ID: HTB22831
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_gollos.html
Product: Gollos
Vendor: Gollos ( http://www.gollos.com/ )
Vulnerable Version: 2.8 and probably prior versions
Vendor Notification: 01 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 "product/list.aspx" script to properly sanitize user-supplied input in "q" 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/product/list.aspx?q=1"><script>alert(document.cookie)</script>&x=0&y=0