Some serious security vulnerabilities existed in the Ninja Forms WordPress plugin that risked over a million sites. Exploiting these vulnerabilities could allow an attacker to takeover target websites and redirect incoming traffic to malicious links.
Of course, any sites under management by ProtectYourWP.com have already been updated with the latest fixes.
Full article: https://latesthackingnews.com/2021/02/22/multiple-vulnerabilities-in-ninja-forms-wordpress-plugin-could-allow-site-takeovers/