Securing a WordPress Site
Learn how to check security on a WordPress site and resolve the issues found.
This will help secure a site, but the only safe site is one that is inaccessible. We also recommend installing Wordfence. See Installing Wordfence on Your WordPress Site.
Steps
Login to the Plesk Panel and click WordPress

Click the Security button

Click the Check Security button

Click the > to expand details

Review the security issues found and click the check box next Security Measures to select all

Click the Secure button

You have successfully resolved the security issues found
