Description
WordPress Plugin MC4WP:Mailchimp for WordPress 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 MC4WP:Mailchimp for WordPress version 4.8.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 4.8.5 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:E84E1FA5-A947-4B2C-A134-19E9B07385B4
https://plugins.svn.wordpress.org/mailchimp-for-wp/trunk/readme.txt