Exploit Title: LiveHelperChat <=4.61 - Stored Cross Site Scripting (XSS) via Operator Surname

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-2025-51397

Exploit link: https://github.com/Thewhiteevil/CVE-2025-51397

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

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

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 Operator Surname field. This payload is stored and later executed when an admin or higher-privileged user views the Recipients List where the attacker is listed as the Owner.

Reproduction Steps:

1. Log in as an operator.

2. Navigate to your Operator Surname field.

3. Create new Operator Surname or Modify the Operator Surname, enter the following payload:

   "><img src="https://raw.githubusercontent.com/thewhiteevil/cve-2025-51397/HEAD/x" onerror="prompt(1);">

4. Save the changes.

5. This payload is stored and later executed when an admin or higher-privileged user views the Recipients List where the attacker is listed as the Owner.