bugtraq - XSS vulnerability in CMS Source

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Message-Id: <201008130713.o7D7D7mG070581@htbridge.ch>
Date: Fri, 13 Aug 2010 09:13:07 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in CMS Source

Vulnerability ID: HTB22549
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_cms_source_1.html
Product: CMS Source
Vendor: Proud Daddy Web Design ( http://www.prouddaddy.net/ ) 
Vulnerable Version: Current at 28.07.2010 and Probably Prior Versions
Vendor Notification: 28 July 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 serach sysem to properly sanitize user-supplied input in "searchstring" 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/home/demo1/index.php?target=search&subtarget=top&searchstring=%3Cimg+src=0+onerror=alert%28document.cookie%29%3E