Exploit Title: LiveHelperChat <=4.61 - Stored Cross Site Scripting (XSS) via Department Assignment Alias Nick Field

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-2025-51403

Exploit link: https://github.com/Thewhiteevil/CVE-2025-51403

Reference: https://livehelperchat.com/4.61v-security-fixes-724a.html

https://github.com/LiveHelperChat/livehelperchat/pull/2228/commits/2056503ad96e04467ec9af8d827109b9b9b46223

A low-privileged user/operator injects a malicious JavaScript payload into the Department Assignment "Alias Nick" field while assigning or editing department access. When a higher-privileged user (e.g., admin or operator) edits the department assignment "Alias Nick" field, the stored script is executed in their browser context.

Reproduction Steps:

1. Log in as an operator.

2. Navigate to your Department Assignment settings page.

3. In the "Alias Nick" field, enter the following payload:

   "><img src="https://raw.githubusercontent.com/thewhiteevil/cve-2025-51403/HEAD/x" onerror="prompt(1);">

4. Save the changes.

5. Revist the Department Assignment settings page and edit the Alias Nick field, the cross site scripting (xss) will execute.