Apple Mac OS X 10.4 through 10.4.7, when the administrator clears the "Allow user to administer this computer" checkbox in System Preferences for a user, does not remove the user's account from the appserveradm or appserverusr groups, which still allows the user to manage WebObjects applications.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29296
http://www.vupen.com/english/advisories/2006/3852
http://www.securityfocus.com/bid/20271
http://securitytracker.com/id?1016955
http://secunia.com/advisories/22187
http://lists.apple.com/archives/security-announce/2006/Sep/msg00002.html