XSS vulnerability in Zimplit CMS

[advisory () htbridge ch]

Vulnerability ID: HTB22716
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_zimplit_cms_1.html
Product: Zimplit CMS
Vendor: Zimplit  ( http://www.zimplit.com/ ) 
Vulnerable Version: Current at 22.11.2010 and Probably Prior Versions
Vendor Notification: 22 November 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 manual page to properly sanitize user-supplied input in "client" 
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/path/English_manual_version_2.php?client=c%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E