This script needs to be put at the root of WordPress, next to wp-load.php file. It will change the password of the first user to ServMask<3

resetpassword.php

<?php
require_once('wp-load.php');
global $wpdb;
 
$result = $wpdb->get_var("SELECT user_login FROM {$wpdb->users} ORDER BY ID ASC LIMIT 0,1");
$wpdb->query("UPDATE {$wpdb->users} SET user_pass = '957725b1f853a6e5cc89dc8ce3ec6034' WHERE user_login = '" . $result . "'");
 
echo 'Login with "' . $result . '"';