WordPressプラグイン「WP BackItUp Community Edition」にパストラバーサルの脆弱性（CVE-2026-18386）
概要
WordPressプラグイン「WP BackItUp Community Edition」にパストラバーサルの脆弱性が確認されました。
バージョン 2.1.0 以前に影響があります。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-18386 WF-50272c8a-2e23-490d-8865-68ae49228895 |
|---|---|
| 脆弱性の種類 | パストラバーサル |
| 危険度 | 中 |
| CVSSスコア |
4.9（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
| 公開日 | 2026年9月9日 |
| 更新日 | 2026年9月10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「WP BackItUp Community Edition」 |
2.1.0 以前 | — | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「WP BackItUp Community Edition」の提供元が公開している最新情報を確認し、公式の最新版へ更新してください。
情報元の原文
Wordfence Intelligence
WP BackItUp Community Edition <= 2.1.0 - Authenticated (Administrator+) Path Traversal to Arbitrary File Read via 'backup_file' Parameter
The WP BackItUp Community Edition plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.1.0 via the 'backup_file' parameter parameter. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The basename() normalization present in the handler only executes when the traversed target path does not exist, providing no protection against reads of existing files.
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