XSS vulnerability in eazyCMS

[advisory () htbridge ch]

Vulnerability ID: HTB22554
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_eazycms_1.html
Product: eazyCMS
Vendor: eazycms.com ( http://eazycms.com/ ) 
Vulnerable Version: Current at 28.07.2010 and Probably Prior Versions
Vendor Notification: 28 July 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
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 "formedit.php" script to properly sanitize user-supplied input in 
"filter_keywords" 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://admin.host/formedit.php?action=list&filter_keywords=%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E

Solution: As this is an online service, there is no need to upgrade. Changes are live from time of publication.