Courier Management System 1.0 - 'First Name' Stored XSS

# Exploit Title: Courier Management System 1.0 - 'First Name' Stored XSS
# Exploit Author: Zhaiyi (Zeo)
# Date: 2020-12-11
# Google Dork: N/A
# Vendor Homepage: https://www.sourcecodester.com/php/14615/task-management-system-using-phpmysqli-source-code.html
# Software Link: https://www.sourcecodester.com/download-code?nid=14615&title=Task+Management+System+using+PHP%2FMySQLi+with+Source+Code
# Affected Version: Version 1
# Category: Web Application

Step 1: Log in to the CMS with any valid user credentials.
Step 2: Click on the logged in username on header and select Manage Account.
Step 3: Rename the user First Name or Last Name to
"<script>alert(1111)</script>".
Step 4: Update Profile and this will trigger the XSS.
Step 5: Logout and login again and the page will display the domain name.