Input validation vulnerability in CM Email Registration Blacklist and Whitelist 1.4.8

A popular plugin for WordPress called “CM Email Registration Blacklist and Whitelist” has a security issue where unauthorized people can make changes to the plugin. This is because the plugin doesn’t properly check for a security code before allowing changes to be made. This means that someone who is not logged in or authorized could add or delete email addresses and change the list of blocked or allowed emails. They can do this by tricking the person who manages the website into clicking on a link.