Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin に脆弱性 — CVE-2026-93428
いま何をすべきか
Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin を 2.14.0 以降に更新してください。
影響を受けるバージョン
- 2.13.1 以下のすべて
対象: プラグイン「Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin」（ultimate-member）
何が起きるのか
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.13.1 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to view privacy-restricted member profile field values — including fields explicitly configured as owner-only, members-only, or role-restricted — by querying the publicly accessible wp_ajax_nopriv_um_get_members endpoint. The nonce required by the endpoint ('um-frontend-nonce') is emitted to all unauthenticated visitors via wp_localize_script, meaning it provides no meaningful access control and any anonymous visitor can satisfy the endpoint's authentication requirements.
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
Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 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。