CMS Made Simple 1.1.3.1 does not check the permissions assigned to users in some situations, which allows remote authenticated users to perform some administrative actions, as demonstrated by (1) adding a user via a direct request to admin/adduser.php and (2) reading the admin log via an "admin/adminlog.php?page=1" request.
http://www.securityfocus.com/archive/1/481984/100/0/threaded
http://securityreason.com/securityalert/3223
http://blog.cmsmadesimple.org/2007/10/07/announcing-cms-made-simple-1141/