AI Engine < 2.1.5 - Editor+ Arbitrary File Upload via add_image_from_url

Description

The plugin is vulnerable to arbitrary file uploads due to missing file type validation in the 'add_image_from_url' function in all versions up to, and including, 2.1.4. This makes it possible for authenticated attackers, with Editor access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.