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Vulnerability record · CVE-2026-44633 · published 14 May 2026

CVE-2026-44633: Incorrect authorization vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.38% · top 70.6% CWE-863 · Incorrect authorization Deferred
8.1CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

LinkTags
https://github.com/LiveHelperChat/livehelperchat/security/advisories/GHSA-hjqq-qmvj-9whm
https://github.com/LiveHelperChat/livehelperchat/security/advisories/GHSA-hjqq-qmvj-9whm

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Source: NIST National Vulnerability Database (record CVE-2026-44633), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.