XSS vulnerability in CMS Source

[advisory () htbridge ch]

Vulnerability ID: HTB22548
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_cms_source.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 "index.php?target=articles" 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/index.php?target=articles&subtarget=X%3Cscript%3Ealert%28document.cookie%29%3C/script%3E