WordPressプラグイン「Blocksy Companion」に不適切な権限管理の脆弱性（CVE-2026-107645）
概要
WordPressプラグイン「Blocksy Companion」に不適切な権限管理の脆弱性が確認されました。
バージョン 2.1.58 以前に影響があります。
修正版 2.1.59 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-107645 WF-7757f41d-c1f1-4df1-8048-b1c78a897548 |
|---|---|
| 脆弱性の種類 | 不適切な権限管理 |
| 危険度 | 重大 |
| CVSSスコア |
9.1（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 公開日 | 2026年10月9日 |
| 更新日 | 2026年10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「Blocksy Companion」 |
2.1.58 以前 | 2.1.59 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Blocksy Companion」を修正版 2.1.59 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
Blocksy Companion <= 2.1.58 - Unauthenticated Privilege Escalation to 'role' Parameter
The Blocksy Companion plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 2.1.58 This is due to the implement_user_registration() AJAX handler explicitly disabling Dokan's vendor-registration nonce check (via add_filter('dokan_register_nonce_check', '__return_false')) and then trusting an attacker-supplied $_POST['role'] value when invoking wc_create_new_customer() and wc_set_customer_auth_cookie(). This makes it possible for unauthenticated attackers to elevate their privileges to a Dokan 'seller' (vendor) account — including sites where the Dokan vendor signup is explicitly turned off — and to be auto-authenticated into that account, which grants publishing capabilities beyond those of a normal customer.
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.