User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission に脆弱性 — CVE-2026-103962
いま何をすべきか
User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission を 4.3.14 以降に更新してください。
影響を受けるバージョン
- 4.3.13 以下のすべて
対象: プラグイン「User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission」(wp-user-frontend)
何が起きるのか
The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'field_attr[required]' parameter in all versions up to, and including, 4.3.13 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The nonce check on the wpuf_get_child_cat AJAX action is not an effective security barrier because the wpuf_nonce value is publicly localized to every anonymous visitor of any page containing a WPUF shortcode, making it freely harvestable by an unauthenticated attacker.
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
User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission 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/wp-user-frontend/tags/4.3.13/includes/Frontend.php#L311
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2025
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2045
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/wpuf-functions.php#L2120
- https://plugins.trac.wordpress.org/changeset/3770255/wp-user-frontend/trunk/wpuf-functions.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7e9e7f3e-900c-4e84-8226-8dc6450b0a31?source=cve