CVE-2026-89334Network attack vectorHinoki check available

Authenticated chat transcript disclosure via unchecked thread access

Published Sep 19, 2026 · Updated Sep 19, 2026

Authorization bypass in WordPlus Better Messages 2.15.33 and earlier allows remote authenticated users to read arbitrary chat-room data. The /thread/ REST handler accepts an attacker-selected thread identifier and returns its transcript, metadata, and user details without confirming that the requester belongs to the thread. Custom-level access is sufficient, and exposure occurs only when the room's only_joined_can_read setting remains at its default value of 0.

CVSS severity6.5
Medium
EPSS probability0.70%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in WordPlus Better Messages 2.15.33 and earlier allows remote authenticated users to read arbitrary chat-room data. The /thread/ REST handler accepts an attacker-selected thread identifier and returns its transcript, metadata, and user details without confirming that the requester belongs to the thread. Custom-level access is sufficient, and exposure occurs only when the room's only_joined_can_read setting remains at its default value of 0.

The record

CVE
CVE-2026-89334
Published
Sep 19, 2026
Updated
Sep 19, 2026
Vendor
WordPlus
Product
Better Messages
Classifications
CWE-862, T1213.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=2.15.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WordPlus · Better Messagesversion=0 <=2.15.33

Published CVSS scores

6.5WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213.005Data from Information Repositories: Messaging Applications

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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