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CVE-2026-89334— Better Messages <= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint

Quick assessment

Affected
wordplus Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots 插件在 2.15.33 及更早的所有版本中均存在授权绕过漏洞。该漏洞是由于插件未能正确验证执行某项操作的用户是否具备相应权限所致。这使得拥有自定义级别或更高权限的已认证攻击者能够无需额外身份验证即可访问任意聊天室线程的完整消息记录、线程元数据以及用户数据。此漏洞仅在聊天室的 设置保持其默认值 时才可被利用。

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-89334

Vulnerability Information
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Vulnerability Title
Better Messages <= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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'.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wordplus Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots 0 ~ 2.15.33 -

II. Public POCs for CVE-2026-89334

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III. Intelligence Information for CVE-2026-89334

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Other References for CVE-2026-89334 (9)

IV. Related Vulnerabilities

Same product: Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots
Same vendor: wordplus
Same weakness: CWE-862

V. Comments for CVE-2026-89334

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