Title : Jbook Cross Site Scripting
Author: Mourad aka Psych0
Moroccan Security Team
Vendor: www.jmuller.net 
Version: 1.3

Jbook Guestbook is a PHP/MySQL based guestbook script.

Vulnerability in index.php, this issue can allow an 
attacker to bypass content filters and potentially carry out xss attacks.

Example:

http://target/path/index.php?page=[xsscode]