CVE-2026-0483
Unknown Unknown - Not Provided
Stored XSS in Live Helper Chat PDF Upload Enables Code Execution

Publication date: 2026-01-28

Last updated on: 2026-01-28

Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)

Description
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.
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Meta Information
Published
2026-01-28
Last Modified
2026-01-28
Generated
2026-06-16
AI Q&A
2026-01-29
EPSS Evaluated
2026-06-15
NVD
CVE-2026-0483
EUVD
EUVD-2026-4895
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
live_helper_chat live_helper_chat to 4.72 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the PDF file upload functionality of Live Helper Chat versions prior to 4.72. An attacker can upload a malicious PDF containing an XSS payload. When a user downloads and opens this PDF via the link generated by the application, the malicious JavaScript code executes in the user's local context.

Impact Analysis

The vulnerability allows an attacker to execute arbitrary JavaScript code in the user's local context when they open a malicious PDF file. This can lead to unauthorized actions performed on behalf of the user, data theft, session hijacking, or other malicious activities depending on the attacker's intent.

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