bugtraq - XSS vulnerability in EasyPublish CMS

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Message-Id: <201005100755.o4A7tsMN013883@htbridge.ch>
Date: Mon, 10 May 2010 09:55:54 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in EasyPublish CMS

Vulnerability ID: HTB22356
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_easypublish_cms.html
Product: EasyPublish CMS
Vendor: Escio AS
Vulnerable Version: Current at 23.04.2010 and Probably Prior Versions
Vendor Notification: 23 April 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 "/index.php" script to properly sanitize user-supplied input in URL. 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/?%22%3E%3Cb%3E%3Cscript%3Ex=document;alert%28x.cookie%29%3C/script%3E

Solution: Upgrade to the most recent verison