WooCommerce Ultimate Gift Card ≤ 2.6.0 - Arbitrary File Upload

The WooCommerce Ultimate Gift Card plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'mwbwgmpreviewmail' and 'mwbwgmwoocommerceaddcartitemdata' functions in all versions up to, and including, 2.6.0. This makes it possible for...