Secunia Security Advisory – Valentin Hoebel has discovered some vulnerabilities in G5 Scripts Guestbook PHP, which can be exploited by malicious people to conduct script insertion attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/88907/sa39596.txt
Source: https://packetstormsecurity.com/files/88907/Secunia-Security-Advisory-39596.html