foreman before version 1.15.0 is vulnerable to an information leak through organizations and locations feature. When a user is assigned _no_ organizations/locations, they are able to view all resources instead of none (mirroring an administrator's view). The user's actions are still limited by their assigned permissions, e.g. to control viewing, editing and deletion.
https://theforeman.org/security.html#2016-7078
https://seclists.org/oss-sec/2017/q1/470
https://projects.theforeman.org/issues/16982
https://github.com/theforeman/foreman/commit/5f606e11cf39719bf62f8b1f3396861b32387905