CVE-2014-4725

The MailPoet Newsletters (wysija-newsletters) plugin before 2.6.7 for WordPress allows remote attackers to bypass authentication and execute arbitrary PHP code by uploading a crafted theme using wp-admin/admin-post.php and accessing the theme in wp-content/uploads/wysija/themes/mailp/.

Date published : 2014-07-27

https://wordpress.org/plugins/wysija-newsletters/changelog/

http://arstechnica.com/security/2014/07/mass-exploit-of-wordpress-plugin-backdoors-sites-running-joomla-magento-too/