The fetch_product_ajax functionality in the Product Feed on WooCommerce WordPress plugin before 3.3.1.0 uses a `product_id` POST parameter which is not properly sanitised, escaped or validated before inserting to a SQL statement, leading to SQL injection.
- https://codevigilant.com/disclosure/2021/wp-plugin-purple-xmls-google-product-feed-for-woocommerce/
- https://wpscan.com/vulnerability/0fa114a0-29df-4312-9138-eb9f0aedb3c5
- https://github.com/20142995/nuclei-templates