We can use several techniques to improve site security, as well as use external services to scan and protect your site from potential threats. However, there is no guarantee that the site will be fully secured even with all the features and services. Gaining access to existing user accounts is one of the major causes behind hacked WordPress sites. Once a security breach is identified, we have to fix the security issue, as well as prevent the unauthorized user from doing any further damage to the site. In such a case, logging out all users and asking them to reset their passwords is a common way of preventing further damage to the site. Once all users are logged out, we can block the login functionality in general, or block specific accounts from logging in until the issue is fixed.
In this recipe, we are going to use an existing plugin to force logout...