WordPressプラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」に認可の欠如の脆弱性（CVE-2026-17563）
概要
WordPressプラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」に認可の欠如の脆弱性が確認されました。
バージョン 4.3.10 以前に影響があります。
修正版 4.3.11 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-17563 WF-d60e9835-63ec-4f31-b247-e92561f9007b |
|---|---|
| 脆弱性の種類 | 認可の欠如 |
| 危険度 | 中 |
| CVSSスコア |
5.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 公開日 | 2026年8月31日 |
| 更新日 | 2026年9月16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」 |
4.3.10 以前 | 4.3.11 | 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 4.3.11 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 <= 4.3.10 - Missing Authorization to Unauthenticated Post Creation
The User Frontend plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.3.10. This is due to missing server-side enforcement of the form's subscription gate in the AJAX post-submission handler, which only checked the gate at render time. This makes it possible for unauthenticated attackers to create posts through subscription-gated frontend forms without purchasing a subscription, bypassing payment requirements entirely.
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