XSS vulnerability in Amethyst

[advisory () htbridge ch]

Vulnerability ID: HTB22499
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_amethyst.html
Product: Amethyst
Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/amethyst ) 
Vulnerable Version: 0.1.5 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 /browse/create_comment script to properly sanitize user-supplied input 
in "comment[name]" 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. Simple enter a string like 
'mynameis<script>alert(document.cookie)</script>' in "Your Name" field of post commenting form, text of comment (like 
You have some mistakes in your post), fill Captcha and press "Add Comment!" button. Alert will appear when the 
Administrator will edit the post.

Solution: Upgrade to the most recent version