WordPressプラグイン「TrueBooker – Appointment Booking and Scheduler System」にユーザー制御の鍵による認可回避（IDOR）の脆弱性（CVE-2026-18315）
概要
WordPressプラグイン「TrueBooker – Appointment Booking and Scheduler System」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 1.2.6 以前に影響があります。
修正版 1.2.7 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-18315 WF-73251a74-5be3-446b-8e0a-ff2d1484c467 |
|---|---|
| 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 | 重大 |
| CVSSスコア |
9.8（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 公開日 | 2026年8月18日 |
| 更新日 | 2026年8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「TrueBooker – Appointment Booking and Scheduler System」 |
1.2.6 以前 | 1.2.7 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「TrueBooker – Appointment Booking and Scheduler System」を修正版 1.2.7 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
TrueBooker <= 1.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to Account Takeover to 'truebooker_wp_user_id' Parameter
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key leading to Account Takeover in all versions up to, and including, 1.2.6. This is due to the admin_user_create_cus AJAX handler lacking any authentication or capability check before passing the attacker-supplied truebooker_wp_user_id parameter directly to wp_update_user. This makes it possible for unauthenticated attackers to overwrite the email address of any WordPress user — including an administrator — and then complete the standard WordPress lost-password flow to fully take over the targeted account.
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