Access violation vulnerability in Formidable Forms – Contact Form, Survey, Quiz, Calculator & Custom Form Builder 2.0.21

The Formidable Form Builder plugin for WordPress is a tool that allows users to build and manage forms for their websites. Unfortunately, there is a security issue in versions of the plugin up until 2.0.21; attackers who are not logged in can access and modify form fields without authorization. This is because the plugin didn’t have enough security measures in place, such as nonce and capability checks on the ‘frm_fill_licenses’ and ‘frm_ajax’ AJAX actions.