Description
WordPress Plugin Registration Forms-User Registration Forms, Invitation-Based Registrations, Front-end User Profile, Login Form & Content Restriction is prone to a privilege escalation vulnerability. Exploiting this issue may allow attackers to bypass the expected capabilities check and perform otherwise restricted actions; other attacks are also possible. WordPress Plugin Registration Forms-User Registration Forms, Invitation-Based Registrations, Front-end User Profile, Login Form & Content Restriction version 3.7.1.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 3.7.1.5 or latest
References
https://www.exploit-db.com/exploits/50395
https://plugins.svn.wordpress.org/pie-register/trunk/readme.txt