Access violation vulnerability in Insert Headers and Footers Code – HT Script 1.1.2

The Insert Headers and Footers Code – HT Script plugin for WordPress has a security vulnerability. This means that someone could change data without permission by using a function called ajax_dismiss. This affects all versions up to and including 1.1.2. People with at least Subscriber-level access can use this to change an option to 1/true on a WordPress site. This could cause errors and prevent legitimate users from accessing the site. It could also be used to change certain values to true, like registration.