WordPress Plugin: expivi: CVE-2022-1953: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The Product Configurator for WooCommerce plugin for WordPress is vulnerable to arbitrary file deletions in versions up to, and including, 1.2.31 due to insufficient file validation and file path validation on the save_image() function that uses unlink() on a user supplied file path. This function is invoked via the wp_ajax_nopriv_mkl_pc_generate_config_image AJAX action which is tied to the generate_config_image() function with no capability checks or nonce validation which makes this issue exploitable via any unauthenticated user such as subscriber, or via a Cross-Site Request Forgery.