WordPressプラグイン「WS Form LITE – Drag & Drop Contact Form Builder」に信頼できないデータのデシリアライズの脆弱性（CVE-2026-4703）
概要
WordPressプラグイン「WS Form LITE – Drag & Drop Contact Form Builder」に信頼できないデータのデシリアライズの脆弱性が確認されました。
バージョン 1.10.80 以前に影響があります。
修正版 1.10.82 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-4703 WF-df36eae9-6f2b-432c-a765-57450939b344 |
|---|---|
| 脆弱性の種類 | 信頼できないデータのデシリアライズ |
| 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21日 |
| 更新日 | 2026年8月22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「WS Form LITE – Drag & Drop Contact Form Builder」 |
1.10.80 以前 | 1.10.82 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「WS Form LITE – Drag & Drop Contact Form Builder」を修正版 1.10.82 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
WS Form LITE <= 1.10.80 - Unauthenticated PHP Object Injection via Form Submission
The WS Form LITE – Drag & Drop Contact Form Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.10.80 via deserialization of untrusted input from form submission meta values. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
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