# Exploit Title: Client Management System 1.1 - Stored Cross Site Scripting (XSS) in 'username' on Admin Profile settings # Date: 18 June 2021 # Exploit Author: BHAVESH KAUL # Author Linkedin: https://www.linkedin.com/in/bhavesh-kaul-cs/ # 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