Description
WordPress Plugin Email Subscribers & Newsletters is prone to multiple vulnerabilities, including security bypass, cross-site request forgery and information disclosure vulnerabilities. Exploiting these issues could allow an attacker to perform otherwise restricted actions and subsequently modify settings, to perform certain administrative actions and gain unauthorized access to the affected application, or to obtain sensitive information which could aid in launching further attacks. WordPress Plugin Email Subscribers & Newsletters version 4.2.2 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 4.2.3 or latest
References
https://www.exploit-db.com/exploits/48698
https://plugins.svn.wordpress.org/email-subscribers/trunk/readme.txt