Hotel And Lodge Management System 1.0 - 'Customer Details' Stored XSS

# Exploit Title: Hotel And Lodge Management System 1.0 - 'Customer Details' Stored XSS
# Exploit Author: Jitendra Kumar Tripathi
# Vendor Homepage: https://www.sourcecodester.com/php/13707/hotel-and-lodge-management-system.html
# Software Link: https://www.sourcecodester.com/download-code?nid=13707&title=Hotel+and+Lodge+Management+System+using+PHP+with+Source+Code
# Version: 1
# Tested on Windows 10 + Xampp 8.0.3

XSS IMPACT:
1: Steal the cookie
2: User redirection to a malicious website

Vulnerable Parameters: Customer Details

*Steps to reproduce:*
1: Log in with a valid username and password. Navigate to the Customer Details (http://localhost/hotel/source%20code/index.php) on the left-hand side.
2: Add the new customer and then add the payload <script>alert(document.cookie)</script>in Customer Name parameter and click on save button. Post Saved successfully.
3: Now, XSS will get stored and trigger every time when you click view customer and the attacker can steal authenticated users' cookies.