Chances are your WordPress website or blog has Yoast, a popular SEO plug-in, installed if you’ve engaged in any sort of SEO activity. A recently discovered flaw has been identified that could allow a blind SQL injection which could potentially lead to a database breach on your website.
If you do have Yoast installed, it’s imperative that you update to their latest version at: https://wordpress.org/plugins/wordpress-seo/
Full details of the updated Yoast plug-in can be viewed here: https://yoast.com/wordpress-seo-security-release/