WordPressプラグイン「Forminator Forms – Contact Form, Payment Form & Custom Form Builder」に危険なファイルのアップロードの脆弱性（CVE-2026-15748）
概要
WordPressプラグイン「Forminator Forms – Contact Form, Payment Form & Custom Form Builder」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 1.56.1 以前に影響があります。
修正版 1.56.2 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-15748 WF-263ac05d-f1ca-46e3-a43e-3b45eb8066d4 |
|---|---|
| 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8月17日 |
| 更新日 | 2026年8月18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「Forminator Forms – Contact Form, Payment Form & Custom Form Builder」 |
1.56.1 以前 | 1.56.2 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Forminator Forms – Contact Form, Payment Form & Custom Form Builder」を修正版 1.56.2 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
Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration
The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-extension blocklist performs exact-key matching that is bypassed by pipe-alternative MIME type keys, combined with a public submission handler that trusts attacker-controlled upload field configuration injected via a forged Select field value. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.