The Riaxe Product Customizer plugin for WordPress is vulnerable to SQL Injection via the 'options' parameter keys within 'product_data' of the /wp-json/InkXEProductDesignerLite/add-item-to-cart REST API endpoint in all versions up to, and including, 2.1.2. This is due to insufficient escaping on the user-supplied parameter and insufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.