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    CVE-2026-44633

    Live Helper Chat is an open-source application that enables live support websites. In 4.84v, the Live Helper Chat REST API chat update endpoint allows a REST user with lhchat/use to update a chat in a department they cannot read. The endpoint accepts arbitrary chat object fields, so the user can change the chat hash and status and then access or tamper with the chat through visitor/widget paths. The same write primitive can set operation_admin, which is later emitted as operator-side JavaScript.

    Published:May 14, 2026
    Last Modified:May 14, 2026
    EPS:May 14, 2026
    EPSS Score:
    CVSS Score:8.1

    Affected Products

    Vendor
    Livehelperchat
    Product
    Livehelperchat

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-27954 (CVSS 4.9) — Live Helper Chat is an open-source application that enables live support websites. In versions up to and inclu…
    CVE-2026-0483 (CVSS 6.9) — Stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, vers…
    CVE-2025-51398 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in the Facebook registration page of Live Helper Chat v4.60 …
    CVE-2025-51396 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in Live Helper Chat v4.60 allows attackers to execute arbitr…
    CVE-2025-51400 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in the Personal Canned Messages of Live Helper Chat v4.60 al…
    CVE-2025-51401 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in the chat transfer function of Live Helper Chat v4.60 allo…
    CVE-2025-51403 (CVSS 6.5) — A stored cross-site scripting (XSS) vulnerability in the department assignment editing module of of Live Helpe…
    CVE-2025-7435 (CVSS 2) — A vulnerability was found in LiveHelperChat lhc-php-resque Extension up to ee1270b35625f552425e32a6a3061cd54b5…
    CVE-2024-27516 (CVSS 9.8) — Server-Side Template Injection (SSTI) vulnerability in livehelperchat before 4.34v, allows remote attackers to…
    CVE-2022-0370 (CVSS 5.4) — Cross-site Scripting (XSS) - Stored in Packagist remdex/livehelperchat prior to 3.93v.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High