Phorum 3.4 Cross Site Scripting

[Peter "Stöckli" <pcs () pcsmedia net>]

Description:
It is possible to insert javascript code in a message and execute it.

1.) go to a phorum
2.) click on new topic
3.) enter any name
4.) enter any email
5.) enter a title in the way like this "><script>alert
("Vulnerable");</script>
6.) enter any text
7.) click the preview button
8.) click the send button on the top of the page

Solution:
Edit the source code to strip malicious characters from title or escape 
malicious characters using addslashes().