Secunia Security Advisory – Some vulnerabilities have been reported in myPHP Guestbook, which can be exploited by malicious people to conduct cross-site scripting attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/47582/sa20764.txt
Source: https://packetstormsecurity.com/files/47582/Secunia-Security-Advisory-20764.html