Cross-site scripting (XSS) vulnerability in picture.php in Advanced Guestbook 2.4.2 allows remote attackers to inject arbitrary web script or HTML via the picture parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34156
http://www.vupen.com/english/advisories/2007/1726
http://www.securityfocus.com/bid/23873
http://www.securityfocus.com/archive/1/467937/100/0/threaded
http://www.netvigilance.com/advisory0012