Description
WordPress Plugin Coming Soon & Maintenance Mode Page is prone to a cross-site request forgery vulnerability. Exploiting this issue may allow a remote attacker to perform certain administrative actions and gain unauthorized access to the affected application; other attacks are also possible. WordPress Plugin Coming Soon & Maintenance Mode Page version 1.57 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.58 or latest
References
https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/
https://plugins.svn.wordpress.org/nifty-coming-soon-and-under-construction-page/trunk/readme.txt