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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.

PUBLISHED Reserved 2025-12-09 | Published 2026-01-28 | Updated 2026-01-28 | Assigner INCIBE




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Default status
unaffected

Any version before 4.72
affected

Credits

Miguel Jimenez Camara finder

References

www.incibe.es/...-scripting-xss-vulnerability-livehelperchat

cve.org (CVE-2026-0483)

nvd.nist.gov (CVE-2026-0483)

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