WordPressプラグイン「Ultra Addons for Contact Form 7」に危険なファイルのアップロードの脆弱性（CVE-2026-82901）
概要
WordPressプラグイン「Ultra Addons for Contact Form 7」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 3.5.50 以前に影響があります。
修正版 3.5.51 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-82901 WF-872e1a05-aacc-44fa-93c1-8c3f7b2fb46d |
|---|---|
| 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9月26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「Ultra Addons for Contact Form 7」 |
3.5.50 以前 | 3.5.51 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Ultra Addons for Contact Form 7」を修正版 3.5.51 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
Ultra Addons for Contact Form 7 <= 3.5.50 - Unauthenticated Arbitrary File Upload via Signature Form Field
The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in the 'uacf7_wpcf7_mail_components' function in all versions up to, and including, 3.5.50. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: This is only exploitable when the plugin's PDF Generator module is enabled, which is disabled by default.
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