XSS vulnerability in CMS Source

[advisory@xxxxxxxxxxx]

Vulnerability ID: HTB22551
Reference: 
http://www.htbridge.ch/advisory/xss_vulnerability_in_cms_source_2.html
Product: CMS Source
Vendor: Proud Daddy Web Design ( http://www.prouddaddy.net/ ) 
Vulnerable Version: Current at 28.07.2010 and Probably Prior Versions
Vendor Notification: 28 July 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 "manage.php" script to properly 
sanitize user-supplied input in "subtarget" 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/home/demo1/manage.php?target=Home&subtarget=top%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E