Are you using the WordPress ‘All in One SEO Pack’ on your WordPress website? Then you will need to update your ‘All In One SEO Pack‘ immediatly. The 2.1.5 version of the All In One Pack contains a vulnerability which allows unwanted privilege escalation. This means, that hackers will be able to grant themselves ‘Administrator’ permissions on the WordPress website.
The ‘All In One SEO Pack’ publishers have published a update. The update, patches the vulnerability which allows unwanted privilege escalation.