SQL injection vulnerability in Advanced Guestbook 2.2 allows remote attackers to execute arbitrary SQL commands and gain privileges via the password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15892
http://marc.info/?l=bugtraq&m=108258046402890&w=2
http://archives.neohapsis.com/archives/bugtraq/2005-02/0138.html