WordPressプラグイン「Online Scheduling and Appointment Booking System – Bookly」にユーザー制御の鍵による認可回避（IDOR）の脆弱性（CVE-2026-104898）
概要
WordPressプラグイン「Online Scheduling and Appointment Booking System – Bookly」にユーザー制御の鍵による認可回避（IDOR）の脆弱性が確認されました。
バージョン 28.4 以前に影響があります。
修正版 28.5 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-104898 WF-1c3cfaa5-00e3-41b6-8f38-cebdd5dec180 |
|---|---|
| 脆弱性の種類 | ユーザー制御の鍵による認可回避（IDOR） |
| 危険度 | 中 |
| CVSSスコア |
6.8（CVSS v3.1） CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
| 公開日 | 2026年10月9日 |
| 更新日 | 2026年10月10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「Online Scheduling and Appointment Booking System – Bookly」 |
28.4 以前 | 28.5 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Online Scheduling and Appointment Booking System – Bookly」を修正版 28.5 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
Online Scheduling and Appointment Booking System <= 28.4 - Insecure Direct Object Reference to Authenticated (Subscriber+) Privilege Escalation via 'id' and 'wp_user_id' Parameters via Query String / JSON Body
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 28.4 via the 'id, wp_user_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the WordPress account binding of any Bookly staff record, including those owned by administrators, effectively hijacking a higher-privileged staff member's account association and escalating privileges. Exploitation requires the attacking user to be linked to at least one Bookly staff record, which occurs by default whenever an admin enables the bookly_gen_allow_staff_edit_profile option (active on fresh installs) and links a WordPress user to a staff entry.
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