WordPressプラグイン「Prime Mover – Backup and Migration」に信頼できないデータのデシリアライズの脆弱性（CVE-2026-115806）
概要
WordPressプラグイン「Prime Mover – Backup and Migration」に信頼できないデータのデシリアライズの脆弱性が確認されました。
バージョン 2.2.1 以前に影響があります。
修正版 2.2.2 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-115806 WF-ab6ebd66-c7a4-402e-b51e-3f1f3183bd97 |
|---|---|
| 脆弱性の種類 | 信頼できないデータのデシリアライズ |
| 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10月22日 |
| 更新日 | 2026年10月27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「Prime Mover – Backup and Migration」 |
2.2.1 以前 | 2.2.2 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Prime Mover – Backup and Migration」を修正版 2.2.2 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
Prime Mover <= 2.2.1 - Unauthenticated PHP Object Injection via Base64-Encoded Comment during Migration Search-and-Replace
The Prime Mover – Backup and Migration plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.2.1 via deserialization of untrusted input in the migration search-and-replace routine (recursiveUnserializeReplace()). An unauthenticated attacker can store a crafted, base64-encoded serialized object in wp_comments.comment_content through the standard comment-submission endpoint (wp-comments-post.php). When an administrator subsequently performs a routine Prime Mover export or restore, the plugin base64-decodes that stored value and passes it to unserialize() with no allowed_classes restriction. A Property-Oriented Programming (POP) chain is present in the plugin's own bundled Freemius library (FS_Clone_Manager::__set → FS_Option_Manager::set_option → store() → update_option()), so no additional plugin or theme is required — the plugin ships the gadget itself.
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