WordPressプラグイン「WP 2FA – Two-factor authentication for WordPress」に不適切な認証の脆弱性（CVE-2026-103514）
概要
WordPressプラグイン「WP 2FA – Two-factor authentication for WordPress」に不適切な認証の脆弱性が確認されました。
バージョン 4.0.0 以前に影響があります。
修正版 4.1.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-103514 WF-68757251-28d3-4468-9d46-16c0928d0618 |
|---|---|
| 脆弱性の種類 | 不適切な認証 |
| 危険度 | 中 |
| CVSSスコア |
4.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| 公開日 | 2026年10月1日 |
| 更新日 | 2026年10月9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「WP 2FA – Two-factor authentication for WordPress」 |
4.0.0 以前 | 4.1.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「WP 2FA – Two-factor authentication for WordPress」を修正版 4.1.0 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
2FA <= 4.0.0 - Unauthenticated Two-Factor Authentication Bypass
The 2FA plugin for WordPress is vulnerable to Two-Factor Authentication Bypass in all versions up to, and including, 4.0.0. This is due to missing per-user invalidation of already-used TOTP codes in the is_valid_authcode() call, which did not receive the user object needed to record and reject previously consumed codes. This makes it possible for Unknown attackers[inject user-level requirements if available and authentication is required] to replay a previously observed TOTP code within its validity window to bypass two-factor authentication and gain unauthorized access to any account, including administrator accounts.
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