Custom Icons for Elementor < 0.3.4 - Authenticated (Admin+) Arbitrary File Upload

Description

The Custom Icons for Elementor plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in all versions up to, and including, 0.3.3. This makes it possible for authenticated attackers, with Administrator-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.