CVE-2026-44633Public exploitNetwork attack vector

Cross-department chat access via unchecked mass assignment

Published May 14, 2026 · Updated May 14, 2026

Incorrect authorization in Live Helper Chat 4.84v allows remote authenticated users to modify and access chats outside assigned departments. The PUT branch in lhc_web/modules/lhrestapi/chat.php applies a weaker write check, then assigns every request attribute except id before saving the chat. A REST user with lhchat/use can replace chat security fields and stage same-origin JavaScript that executes when an operator processes the affected chat.

CVSS severity8.1
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in Live Helper Chat 4.84v allows remote authenticated users to modify and access chats outside assigned departments. The PUT branch in lhc_web/modules/lhrestapi/chat.php applies a weaker write check, then assigns every request attribute except id before saving the chat. A REST user with lhchat/use can replace chat security fields and stage same-origin JavaScript that executes when an operator processes the affected chat.

The record

CVE
CVE-2026-44633
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Live Helper Chat
Product
Live Helper Chat
Classifications
CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.84v

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Live Helper Chat · Live Helper Chatversion=< 4.84v

Published CVSS scores

8.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo