WordPressプラグイン「Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-96256）
概要
WordPressプラグイン「Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns」にクロスサイトスクリプティング（XSS）の脆弱性が確認されました。
バージョン 6.4.5 以前に影響があります。
修正版 6.4.6 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-96256 WF-606f25d9-f8c7-416a-8bb8-0cc57901ff5a |
|---|---|
| 脆弱性の種類 | クロスサイトスクリプティング（XSS） |
| 危険度 | 中 |
| CVSSスコア |
6.4（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 公開日 | 2026年9月30日 |
| 更新日 | 2026年10月1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「Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns」 |
6.4.5 以前 | 6.4.6 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns」を修正版 6.4.6 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
Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute
The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Google Map block's 'marker' attribute in versions up to, and including, 6.4.5 This is due to insufficient input sanitization and output escaping on marker title/content values, which are stored as JSON and then decoded and concatenated directly into raw HTML by the frontend script's InfoWindow content builder. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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