WordPressプラグイン「JetFormBuilder — Dynamic Blocks Form Builder」にコードインジェクションの脆弱性（CVE-2026-19859）
概要
WordPressプラグイン「JetFormBuilder — Dynamic Blocks Form Builder」にコード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 3.6.5.2 未満に影響があります。
修正版 3.6.5.2 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-19859 WF-11f367a0-3a1a-474b-8dae-b3b0f942574a |
|---|---|
| 脆弱性の種類 | コードインジェクション |
| 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3日 |
| 更新日 | 2026年9月9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「JetFormBuilder — Dynamic Blocks Form Builder」 |
3.6.5.2 未満 | 3.6.5.2 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「JetFormBuilder — Dynamic Blocks Form Builder」を修正版 3.6.5.2 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
JetFormBuilder — Dynamic Blocks Form Builder < 3.6.5.2 - Unauthenticated Arbitrary Shortcode Execution
The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Remote Code Execution in all versions up to 3.6.5.2. This is due to unsanitized request-supplied message content being passed through shortcode expansion before escaping was applied, and an incorrect escaping order in sanitize_wysiwyg() (wp_kses_post before wp_specialchars_decode) that allowed entity-encoded payloads to survive sanitization and be decoded in time for shortcode parsing. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes registered on the site by injecting shortcode syntax into form message content that is displayed on any page rendering a JetFormBuilder form.
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