Cross-site scripting (XSS) vulnerability in index.php in Micro GuestBook allows remote attackers to execute arbitrary SQL commands via the (1) name or (2) comment ("text") fields.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27911
http://www.vupen.com/english/advisories/2006/2935
http://www.securityfocus.com/bid/19119
http://www.securityfocus.com/archive/1/440855/100/0/threaded
http://securityreason.com/securityalert/1285