WordPressプラグイン「Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder」にインジェクションの脆弱性（CVE-2026-89435）
概要
WordPressプラグイン「Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder」にインジェクションの脆弱性が確認されました。
バージョン 6.35 以前に影響があります。
修正版 7.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-89435 WF-87661de6-e835-495e-9bd2-4d64b4718108 |
|---|---|
| 脆弱性の種類 | インジェクション |
| 危険度 | 高 |
| CVSSスコア |
8.8（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 公開日 | 2026年10月29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「Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder」 |
6.35 以前 | 7.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder」を修正版 7.0 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
Formidable Forms <= 6.35 - Authenticated (Subscriber+) Arbitrary Plugin Installation via 'file_url' Parameter
The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is vulnerable to Arbitrary Plugin Installation in all versions up to, and including, 6.35 via the 'file_url' parameter parameter. This is due to insufficient URL prefix validation in validate_url_is_in_s3_bucket() and a permission callback that relies solely on a shared token obtainable by any user with the delegable frm_view_forms capability, without checking install_plugins or activate_plugins capabilities. This makes it possible for authenticated attackers, with subscriber-level access and above, to install arbitrary plugins on the server. Exploitation additionally requires that the site is free-only (Formidable Pro is NOT installed).
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