WordPressプラグイン「Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots」に認可の欠如の脆弱性（CVE-2026-89334）
概要
WordPressプラグイン「Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots」に認可の欠如の脆弱性が確認されました。
バージョン 2.15.33 以前に影響があります。
修正版 3.0.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-89334 WF-b3243fe4-9d11-49f0-884b-0162cd776993 |
|---|---|
| 脆弱性の種類 | 認可の欠如 |
| 危険度 | 中 |
| CVSSスコア |
6.5（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 公開日 | 2026年9月18日 |
| 更新日 | 2026年9月19日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| WordPressプラグイン「Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots」 |
2.15.33 以前 | 3.0.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots」を修正版 3.0.0 またはそれ以降の公式最新版へ更新してください。
情報元の原文
Wordfence Intelligence
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'.
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