Centra is a program used by businesses and colleges, it allows users to stream microsoft office and other applications over the web in a nice enviroment with voip options.  However on root directory when you go in to enroll for a session if you create or modify your username, first name, or last name to contain any html code it will be ran.  For instance:

<script>alert("hi");</script> will result in a popup box that says hi

You can put iframes in the portal to keep people from being able to access the application.  

FIX: Use the cleartext function to strip fields that users have input to.

- Clorox
http://g00ns.com
http://g00ns-forums.com