Give is a WordPress plugin which allows users to setup a donation page on a website. It currently has 60k installs.
During a recent audit of the plugin, we found a severe vulnerability which allows donors to inject arbitrary code on an administrative page.
If you are using a version lower than 2.4.7, you should update immediately.
When creating a donation, all of the arguments are sanitized as text fields, but this method does not take into consideration where the variables are reflected.