WordPressプラグイン「OAuth Single Sign On – SSO (OAuth Client)」に不適切な認証の脆弱性（CVE-2026-97274）
概要
WordPressプラグイン「OAuth Single Sign On – SSO (OAuth Client)」に不適切な認証の脆弱性が確認されました。
バージョン 7.1.2 以前に影響があります。
修正版 7.1.3 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-97274 WF-d61a1e57-9285-437f-a6b1-48e553c49533 |
|---|---|
| 脆弱性の種類 | 不適切な認証 |
| 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9月30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「OAuth Single Sign On – SSO (OAuth Client)」 |
7.1.2 以前 | 7.1.3 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「OAuth Single Sign On – SSO (OAuth Client)」を修正版 7.1.3 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
OAuth Single Sign On – SSO (OAuth Client) <= 7.1.2 - Unauthenticated Authentication Bypass
The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 7.1.2. This is due to missing enforcement of the email-verification claim when the claim is absent from the IdP response, because the old inline check was gated on isset($resource_owner[$idp_email_verified_key]) and skipped silently when the claim was not present. This makes it possible for unauthenticated attackers to gain access to an account without a verified email address by authenticating through an OAuth provider that omits the email-verification claim from its response, causing the verification check to be silently bypassed. The 'email verified' check must be enabled in the plugin settings (mo_oauth_email_verify_check).
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