PHP remote file inclusion vulnerability in template.class.php in Carbonize Lazarus Guestbook before 1.7.3 allows remote attackers to execute arbitrary PHP code via a URL in the include_path parameter to admin.php, probably due to a dynamic variable evaluation vulnerability.
http://www.vupen.com/english/advisories/2007/0874
http://www.securityfocus.com/archive/1/469218/100/0/threaded
http://www.securityfocus.com/archive/1/463041/100/0/threaded
http://www.securityfocus.com/archive/1/462235/100/100/threaded
http://www.securityfocus.com/archive/1/462183/100/100/threaded
http://www.attrition.org/pipermail/vim/2007-March/001417.html