The Registration Forms – User Registration Forms, Invitation-Based Registrations, Front-end User Profile, Login Form & Content Restriction plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.8.4 through publicly exposed log files. This makes it possible for unauthenticated attackers to view potentially sensitive information about users contained in the exposed log files.

Unrestricted Upload of File with Dangerous Type vulnerability in Pie Register.This issue affects Pie Register: from n/a through 3.8.3.1.

The Pie Register – User Registration Forms. Invitation based registrations, Custom Login, Payments WordPress plugin before 3.7.0.1 does not sanitise the invitaioncode GET parameter when outputting it in the Activation Code page, leading to a reflected Cross-Site Scripting issue.