Input validation vulnerability in Payment Forms for Paystack 4.0.2

The Payment Forms for Paystack plugin used in WordPress has a security vulnerability that allows hackers to inject harmful code into certain parts of the plugin. This can happen if the user has contributor-level access or higher. The issue is caused by not properly cleaning up and protecting user input, making it possible for attackers to insert their own code that will run when someone visits a page with the injected code.