bugtraq - cross site scripting vulnerability in BLOG:CMS

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Date: Wed, 15 Dec 2010 20:21:58 +0100 (CET)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: cross site scripting vulnerability in BLOG:CMS

Vulnerability ID: HTB22726
Reference: http://www.htbridge.ch/advisory/cross_site_scripting_vulnerability_in_blogcms.html
Product: BLOG:CMS
Vendor: Radek Hulán ( http://blogcms.com/ ) 
Vulnerable Version: 4.2.1.e and probably prior versions
Vendor Notification: 30 November 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 "admin/index.php" script to properly sanitize user-supplied input in "action" 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/admin/index.php?action=settingsedit"><script>alert(document.cookie)</script>
Solution: Upgrade to the most recent version