bugtraq - HTB22958: XSS in phpGraphy

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Message-Id: <201104280909.p3S99Nlg044433@htbridge.ch>
Date: Thu, 28 Apr 2011 11:09:23 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: HTB22958: XSS in phpGraphy 

Vulnerability ID: HTB22958
Reference: http://www.htbridge.ch/advisory/xss_in_phpgraphy.html
Product: phpGraphy 
Vendor: http://phpgraphy.sourceforge.net/ ( http://phpgraphy.sourceforge.net/ ) 
Vulnerable Version: 0.9.13b
Vendor Notification: 14 April 2011 
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium 
Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.
The vulnerability exists due to failure in the "/themes/default/header.inc.php" script to properly sanitize user-supplied input in "theme_dir" variable then register_globals on. 
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.

The following PoC is available:  

http://[host]/themes/default/header.inc.php?theme_dir=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E