Vulnerability ID: HTB22370
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_gpeasy_cms.html 
Product: gpEasy CMS
Vendor: gpeasy
Vulnerable Version: 1.6.2 and Probably Prior Versions
Vendor Notification: 05 May 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
Risk level: Medium 
Credit: High-Tech Bridge SA (http://www.htbridge.ch/) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application. 

The vulnerability exists due to failure in the "include/tool/editing_files.php" script to properly sanitize user-supplied input in "gpcontent" 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:


action="http://example.com/index.php/Home" name="myfrm"> 






Solution: Upgrade to the most recent verison