Multiple SQL injection vulnerabilities in mes_add.php in x-script GuestBook 1.3a, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the (1) name, (2) email, (3) icq, and (4) website parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36895
http://www.vupen.com/english/advisories/2007/3347
http://www.securityfocus.com/bid/25890
http://www.securityfocus.com/archive/1/481209/100/0/threaded