LiveHelperChat 4.61 - Stored Cross Site Scripting (XSS) via Personal Canned Messages

# Exploit Title: LiveHelperChat 4.61 - Stored Cross Site Scripting (XSS)
via Personal Canned Messages
# Date: 09/06/2025
# Exploit Author: Manojkumar J (TheWhiteEvil)
# Linkedin: https://www.linkedin.com/in/manojkumar-j-7ba35b202/
# Vendor Homepage: https://github.com/LiveHelperChat/livehelperchat/
# Software Link:
https://github.com/LiveHelperChat/livehelperchat/
# Version: <=4.61
# Patched Version: 4.61
# Category: Web Application
# Tested on: Mac OS Sequoia 15.5, Firefox
# CVE : CVE-2025-51400
# Exploit link: https://github.com/Thewhiteevil/CVE-2025-51400

A stored cross-site scripting (XSS) vulnerability in Live Helper Chat
version ≤ 4.61 allows attackers to execute arbitrary JavaScript by
injecting a crafted payload into the Personal Canned Messages. When an
admin or operator user views the message, and tries to send canned messages
the stored javascript executes in their browser context.

## Reproduction Steps:

1. Log in as an operator.
2. Navigate to your Personal Canned Messages.
3. Create new personal canned message, enter the following payload:
   ```
  "><img src="x" onerror="prompt(1);">
   ```
4. Save the changes.
5. Try to use the personal canned message, the cross site scripting (xss)
will execute.