Authorization Bypass in Better Messages Chat Rooms WP Plugin v2.15.33
CVE-2026-89334 Published on September 19, 2026
Better Messages <= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint
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'.
Timeline
Vendor Notified
Disclosed 7 days later.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-89334 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-89334
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Affected Versions
wordplus Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots:- Before and including 2.15.33 is affected.