CVE-2026-89334
Better Messages <= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint
Description
The Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.15.33. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to access the full message transcript, thread metadata, and user data of any chat-room thread without authentication. This is only exploitable when the chat room's only_joined_can_read setting retains its default value of '0'.
INFO
Published Date :
Sept. 19, 2026, 3:17 a.m.
Last Modified :
Sept. 19, 2026, 3:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-89334
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Better Messages plugin to the latest version.
- Verify plugin settings related to chat room read permissions.
- Review chat room configuration for the 'only_joined_can_read' setting.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-89334.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-89334 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-89334
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-89334 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-89334 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Sep. 19, 2026
Action Type Old Value New Value Added Description The Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.15.33. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to access the full message transcript, thread metadata, and user data of any chat-room thread without authentication. This is only exploitable when the chat room's only_joined_can_read setting retains its default value of '0'. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-862 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89334.json">CVE-2026-89334</a> Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3533 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3582 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3601 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L181 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L1964 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L2598 Added Reference https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L418 Added Reference https://plugins.trac.wordpress.org/changeset?old_path=bp-better-messages%2Ftags%2F2.15.33%2Finc%2Ffunctions.php&new_path=bp-better-messages%2Ftags%2F3.0.0%2Finc%2Ffunctions.php Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/b3243fe4-9d11-49f0-884b-0162cd776993?source=cve