WordPressプラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」に不適切な認可の脆弱性（CVE-2026-95523）
概要
WordPressプラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」に不適切な認可の脆弱性が確認されました。
バージョン 4.3.11 以前に影響があります。
修正版 4.3.12 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-95523 WF-8ac37b1f-a4da-41d7-92c4-9ca09cc9372c |
|---|---|
| 脆弱性の種類 | 不適切な認可 |
| 危険度 | 中 |
| CVSSスコア |
6.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| 公開日 | 2026年9月23日 |
| 更新日 | 2026年9月30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「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」 |
4.3.11 以前 | 4.3.12 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」を修正版 4.3.12 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
User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission <= 4.3.11 - Authenticated (Subscriber+) Subscription Gate Bypass on Post Submission
The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Authorization Bypass in all versions up to, and including, 4.3.11. This is due to missing validation that the caller-supplied form_id refers to an actual wpuf_forms post, and server-side submission status being determined from a client-controlled field rather than post meta. This makes it possible for authenticated attackers, with subscriber-level access and above, to create posts while bypassing subscription and payment gates by supplying a non-form post ID as the form_id parameter, or by manipulating the submission-status field to skip the posting-quota check entirely.
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