Group.pm in Metadot Portal Server 6.4.4 and earlier does not properly reset the $IS_OWNER, $IS_ADMIN, and $IS_MANAGER global variables when performing checks for special privileges, which allows users to gain administrator privileges by adding themselves to the SITE_MGR group.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23847
http://www.vupen.com/english/advisories/2005/3030
http://www.securityfocus.com/bid/15975
http://www.securityfocus.com/archive/1/420002/100/0/threaded
http://www.metadot.com/metadot/index.pl?iid=2632
http://securityreason.com/securityalert/287
http://secunia.com/advisories/18137
http://archives.neohapsis.com/archives/fulldisclosure/2005-12/1012.html