Backuply – Backup, Restore, Migrate and Clone に脆弱性 — CVE-2026-93953
いま何をすべきか
Backuply – Backup, Restore, Migrate and Clone を 1.5.9 以降に更新してください。
影響を受けるバージョン
- 1.5.8 以下のすべて
対象: プラグイン「Backuply – Backup, Restore, Migrate and Clone」(backuply)
何が起きるのか
The Backuply – Backup, Restore, Migrate and Clone plugin for WordPress is vulnerable to SQL Injection via the Biographical Info field (second-order, via restore) in all versions up to, and including, 1.5.8 due to insufficient escaping on the user supplied parameter and the lack of sufficient preparation on an existing SQL query. Backuply exports the Biographical Info value verbatim inside an INSERT statement written to the backup's SQL dump (wp_usermeta). When an Administrator later restores such a backup, the crafted payload breaks out of that INSERT statement and appends attacker-controlled SQL that executes with full database privileges. This makes it possible for authenticated attackers, with subscriber-level access and above, to write arbitrary data to the database — in particular to update the default_role option in wp_options to administrator (and enable open user registration) — so that a subsequently registered account is automatically granted the Administrator role, resulting in privilege escalation and full site takeover. Because the injection executes inside an INSERT during restore with no response returned to the attacker, the primitive is used to modify database records rather than to read existing data directly.
ここから先の選択肢
1. 自分たちで対応する
更新の手順、バックアップの取り方、壊れたときの戻し方をまとめています。
2. いまの制作会社・保守業者に頼む
Backuply – Backup, Restore, Migrate and Clone を使っているかどうかを含めて確認を依頼してください。 無料診断を実行すると、そのまま渡せる依頼文を作れます。
3. 相談先がない・自分では難しい
連絡が取れる相手がいない、管理画面に入れない、侵入された疑いがある。 そうした場合はご相談ください。
出典
- https://plugins.trac.wordpress.org/browser/backuply/tags/1.5.7/backup_ins.php#L140
- https://plugins.trac.wordpress.org/browser/backuply/tags/1.5.7/backup_ins.php#L592
- https://plugins.trac.wordpress.org/browser/backuply/tags/1.5.7/restore_ins.php#L2247
- https://plugins.trac.wordpress.org/browser/backuply/tags/1.5.7/restore_ins.php#L2255
- https://plugins.trac.wordpress.org/changeset/3723257/backuply
- https://www.wordfence.com/threat-intel/vulnerabilities/id/202a2d02-a069-43d1-9ebe-59828e828c03?source=cve