XSS in CompactCMS

Vulnerability ID: HTB22695
Reference: http://www.htbridge.ch/advisory/xss_in_compactcms.html
Product: CompactCMS
Vendor: compactcms.nl ( http://www.compactcms.nl/ )
Vulnerable Version: 1.4.1
Vendor Notification: 04 November 2010
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
Risk level: Low
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 "Comments" module to properly sanitize user-supplied input in "website" 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.

Attacker can create comment with special crafted website variable. The following PoC is available:

http://host/?a="><script>alert("XSS");</script>

Solution: Upgrade to the most recent version