Stored Cross-Site Scripting (XSS) vulnerability in LiveHelperChat

Posted date 26/01/2026

Identificador

INCIBE-2026-055

Importance

3 - Medium

Affected Resources

LiveHelperChat, versions prior to 4.72.

Description

INCIBE has coordinated the publication of a medium-severity vulnerability affecting LiveHelperChat, an open-source live chat platform. The vulnerability was discovered by Miguel Jimenez Camara.

This vulnerability has been assigned the following code, CVSS v4.0 base score, CVSS vector, and CWE vulnerability type:

CVE-2026-0483: CVSS v4.0: 6.9 | CVSS AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CWE-79

Solution

The vulnerability has been fixed in the 4.72 version.

Detail

CVE-2026-0483: stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, versions prior to 4.72. An attacker can upload a malicious PDF file containing an XSS payload, which will be executed in the user's context when they download and open the file via the link generated by the application. The vulnerability allows arbitrary JavaScript code to be executed in the user's local context.

CVE

Explotación

References list

4.72 Maintenance release

Etiquetas