SQL injection vulnerability in email.php in MGB OpenSource Guestbook 0.5.4.5 and earlier allows remote attackers to execute arbitrary SQL commands via the id parameter.
https://www.exploit-db.com/exploits/3141
https://exchange.xforce.ibmcloud.com/vulnerabilities/31551
http://www.vupen.com/english/advisories/2007/0232
http://www.tv-kritik.net/mgb/index.php
http://www.attrition.org/pipermail/vim/2007-January/001246.html