WordPressテーマ「Divi」にサーバーサイドリクエストフォージェリ（SSRF）の脆弱性（CVE-2026-4361）
概要
WordPressテーマ「Divi」にサーバーサイドリクエストフォージェリ（SSRF）の脆弱性が確認されました。
バージョン 4.27.6 以前に影響があります。
修正版 4.27.7 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-4361 WF-f35c0de9-abed-4cbf-a28c-48f8133a1bad |
|---|---|
| 脆弱性の種類 | サーバーサイドリクエストフォージェリ（SSRF） |
| 危険度 | 中 |
| CVSSスコア |
5.0（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |
| 公開日 | 2026年9月4日 |
| 更新日 | 2026年9月5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テーマ「Divi」 |
4.27.6 以前 | 4.27.7 | Wordfence Intelligence |
推奨対応
- WordPressテーマ「Divi」を修正版 4.27.7 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
Divi <= 4.27.6 - Authenticated (Contributor+) Server-Side Request Forgery via 'image_src' Parameter
The Divi theme for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 4.27.6. This is due to the `et_pb_set_video_oembed_thumbnail_resolution()` function using `wp_remote_get()` instead of `wp_safe_remote_get()` to fetch a remote image URL, which does not restrict requests to private or reserved IP ranges. This makes it possible for authenticated attackers, with Contributor-level access and above, to make web requests to arbitrary locations originating from the web application server. The response body is not returned to the attacker (blind SSRF), but two oracles exist: a status oracle (the returned URL string differs depending on whether the target responded with HTTP 200) and a timing oracle (response time varies by target reachability).
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