status.cgi in Nagios 4.0 before 4.0 beta4 and 3.x before 3.5.1 does not properly restrict access to certain users that are a contact for a service which allows remote authenticated users to obtain sensitive information about hostnames via the servicegroup (1) overview (2) summary or (3) grid style in status.cgi. NOTE: this behavior is by design in most 3.x versions but the upstream vendor \decided to change it for Nagios 4\ and 3.5.1.