WordPressプラグイン「Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection)」に危険なファイルのアップロードの脆弱性（CVE-2026-94589）
概要
WordPressプラグイン「Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection)」に危険なファイルのアップロードの脆弱性が確認されました。
バージョン 3.4.5 以前に影響があります。
修正版 3.4.6 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-94589 WF-fa3193c4-dd3e-4d9e-be42-769c7358beae |
|---|---|
| 脆弱性の種類 | 危険なファイルのアップロード |
| 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10月9日 |
| 更新日 | 2026年10月10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「Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection)」 |
3.4.5 以前 | 3.4.6 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection)」を修正版 3.4.6 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
Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection) <= 3.4.5 - Unauthenticated Arbitrary File Upload via Signature Field File Upload
The Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection) plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.4.5 via the extcf7_submit function. This is due to missing file extension, MIME type, and size validation in the signature field's validation_filter(), combined with the absence of PHP-execution guards in the upload directory and a sanitize_file_name() bypass that converts shell.php- into shell.php. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
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