PHP remote file inclusion vulnerability in _editor.php in HTMLeditbox 2.2 allows remote attackers to execute arbitrary PHP code via a URL in the settings[app_dir] parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33875
http://www.securityfocus.com/bid/23664
http://www.securityfocus.com/archive/1/466841/100/0/threaded