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CVE-2026-44633— Live Helper Chat: REST API chat update accepts arbitrary chat fields across department boundaries

Quick assessment

Affected
LiveHelperChat livehelperchat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Live Helper Chat是Live Helper Chat个人开发者的一款开源的支持在线聊天的插件。为web平台提供聊天功能。 Live Helper Chat 4.84v版本存在安全漏洞，该漏洞源于REST API聊天更新端点允许用户更新不可读部门的聊天，可能导致访问或篡改聊天内容。

CVSS 8.1 · High EPSS 0.38% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
LiveHelperChat livehelperchat < 4.84v affected
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I. Basic Information for CVE-2026-44633

Vulnerability Information
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Vulnerability Title
Live Helper Chat: REST API chat update accepts arbitrary chat fields across department boundaries
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Live Helper Chat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Live Helper Chat是Live Helper Chat个人开发者的一款开源的支持在线聊天的插件。为web平台提供聊天功能。 Live Helper Chat 4.84v版本存在安全漏洞，该漏洞源于REST API聊天更新端点允许用户更新不可读部门的聊天，可能导致访问或篡改聊天内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LiveHelperChat livehelperchat < 4.84v -

II. Public POCs for CVE-2026-44633

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III. Intelligence Information for CVE-2026-44633

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Vendor Advisories for CVE-2026-44633 (1)

IV. Related Vulnerabilities

Same product: livehelperchat
Same vendor: LiveHelperChat
Same weakness: CWE-863

V. Comments for CVE-2026-44633

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