The WPS Hide Login WordPress plugin before 1.9.16.4 does not prevent redirects to the login page via the authredirect WordPress function, allowing an unauthenticated visitor to access the hidden login page.

WPS Hide Login 1.6.1 allows remote attackers to bypass a protection mechanism via postpassword.

The WPS Hide Login plugin for WordPress is vulnerable to Login Page Disclosure in all versions up to, and including, 1.9.15.2. This is due to a bypass that is created when the 'action=postpass' parameter is supplied. This makes it possible for attackers to easily discover any login page that may have been hidden by the plugin.

The WPS Hide Login plugin for WordPress is vulnerable to login page disclosure even when the settings of the plugin are set to hide the login page making it possible for unauthenticated attackers to brute force credentials on sites in versions up to, and including, 1.5.4.2.