Input validation vulnerability in Global Multisite Search 1.0.1

The Global Multisite Search plugin for WordPress is vulnerable to something called Cross-Site Request Forgery in versions up to 1.0.1. This means that it is not secure enough and is not protecting itself from attackers. It is possible for unauthenticated attackers, such as hackers, to query and read content from multiple sites without a proper authentication, if they can convince a site administrator to do something like click on a link.