Description
WordPress Plugin Controlled Admin Access is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions and subsequently create a new administrator with unrestricted access to the blog. WordPress Plugin Controlled Admin Access version 1.5.5 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.5.7 or latest
References
https://blog.nintechnet.com/vulnerabilities-fixed-in-wordpress-controlled-admin-access-plugin/
https://plugins.svn.wordpress.org/controlled-admin-access/trunk/readme.txt