Cross-site scripting (XSS) vulnerability in Scriptsez Cute Guestbook 20060211 allows remote attackers to inject arbitrary web script or HTML via the Comments field when signing the guestbook.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26244
http://www.securityfocus.com/bid/17832
http://www.securityfocus.com/archive/1/432953/100/0/threaded