Etomite Content Management System 0.6, and possibly earlier versions, when downloaded from the web site in January 2006 after January 10, contains a back door in manager/includes/todo.inc.php, which allows remote attackers to execute arbitrary commands via the "cij" parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24254
http://www.vupen.com/english/advisories/2006/0283
http://www.securityfocus.com/bid/16336
http://www.securityfocus.com/archive/1/423523/100/0/threaded
http://www.securityfocus.com/archive/1/423497/100/0/threaded
http://www.lucaercoli.it/advs/etomite.txt
http://www.etomite.org/forums/index.php?showtopic=4291