Customer Support System 1.0 Cross Site Scripting

`# Exploit Title: Customer Support System 1.0 - "First Name" & "Last Name" Stored XSS  
# Exploit Author: Saeed Bala Ahmed (r0b0tG4nG)  
# Date: 2020-12-11  
# Google Dork: N/A  
# Vendor Homepage: https://www.sourcecodester.com/php/14587/customer-support-system-using-phpmysqli-source-code.html  
# Software Link: https://www.sourcecodester.com/download-code?nid=14587&title=Customer+Support+System+using+PHP%2FMySQLi+with+Source+Code  
# Affected Version: Version 1  
# Tested on: Parrot OS  
  
Step 1. Login to the application with any valid credentials  
  
Step 2. Click on the username in header and select "Manage Account".  
  
Step 3. On "Manage Account" page, insert "<script>alert("r0b0tG4nG")</script>" in both the "First Name" & "Last Name" fields.  
  
Step 4. Complete the other required details and click on save to update user information.  
  
Step 5. This should trigger the XSS payloads. Whenever the user logs in with same valid credentials, the XSS payloads will be triggered  
`