Uncanny Toolkit for LearnDash に脆弱性 — CVE-2026-119096
いま何をすべきか
Uncanny Toolkit for LearnDash を 3.8.3 以降に更新してください。
影響を受けるバージョン
- 3.8.2 以下のすべて
対象: プラグイン「Uncanny Toolkit for LearnDash」(uncanny-learndash-toolkit)
何が起きるのか
The Uncanny Toolkit for LearnDash plugin for WordPress is vulnerable to Authentication Bypass in versions up to, and including, 3.8.2 via the `email` parameter of the `uo_login_action()` function. This is due to a parser-differential flaw in which the plugin's account-verification gate resolves the submitted `email` value using the raw, unsanitized string passed to `get_user_by()`, while the subsequent `wp_signon()` call relies on WordPress core's internal `sanitize_user()` to strip appended junk characters — causing the gate lookup to fail and be skipped entirely while the real account is still resolved and authenticated. This makes it possible for unauthenticated attackers to log in to unverified or administrator-suspended accounts whose credentials they already possess, obtaining a valid `wordpress_logged_in` session cookie and defeating the plugin's account-approval and account-suspension controls. The nonce required to reach the handler is freely obtainable in the same request from the unauthenticated `ult-refresh-nonce` endpoint, making exploitation trivial for any attacker with network access to the site and knowledge of a target account's credentials.
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
Uncanny Toolkit for LearnDash 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/uncanny-learndash-toolkit/tags/3.8.2/src/classes/frontend-login-plus.php#L3357
- https://plugins.trac.wordpress.org/browser/uncanny-learndash-toolkit/tags/3.8.2/src/classes/frontend-login-plus.php#L3446
- https://plugins.trac.wordpress.org/browser/uncanny-learndash-toolkit/tags/3.8.2/src/classes/frontend-login-plus.php#L3527
- https://plugins.trac.wordpress.org/browser/uncanny-learndash-toolkit/tags/3.8.2/src/classes/frontend-login-plus.php#L3559
- https://plugins.trac.wordpress.org/changeset/3773997/uncanny-learndash-toolkit/trunk/src/classes/frontend-login-plus.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/592b61a1-9ac9-4817-b154-1e39e50d8010?source=cve