Newsletter – Send awesome emails from WordPress に脆弱性 — CVE-2026-92537

いま何をすべきか

Newsletter – Send awesome emails from WordPress を 9.4.0 以降に更新してください。

影響を受けるバージョン

• 9.3.9 以下のすべて

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Insufficiently Protected Credentials in all versions up to, and including, 9.3.9 The plugin's public click-tracking REST route `/tnp/l/` is registered with `permission_callback => '__return_true'` and, upon receiving a valid keyed-MD5 signature, calls `set_user_cookie()`, which emits a `Set-Cookie: newsletter=<id>-<raw_token>` response header to the requester because the subscriber object loaded via `get_user()` lacks the `_trusted` property, causing `get_user_key()` to return the raw token column value instead of its MD5-masked variant. This makes it possible for unauthenticated attackers who obtain any signed click-tracking URL for a target subscriber to receive that subscriber's permanent raw authentication cookie, which they can then use to export the subscriber's full PII record via the JSON profile-export endpoint (`?na=px`), rewrite the subscriber's stored profile (`?na=ps`), and silently unsubscribe the subscriber via the RFC-8058 one-click endpoint (`?na=ocu`), none of which require a nonce, password, or email challenge. Signed tracking URLs are embedded in every external link of every newsletter delivered to a subscriber, carry no timestamp, and never expire until the site's relink key rotates, meaning that any party who observes such a URL — through a forwarded email, a shared inbox, a mail-gateway log, or Referer headers on the redirect target, which has no Referrer-Policy set — can replay it indefinitely to obtain the victim's credential.

この説明は公開データベースの記載をそのまま載せています。 日本語の要約は付けていません。訳の過程で意味が変わると、対応の判断を誤らせるためです。

• https://www.wordfence.com/threat-intel/vulnerabilities/id/ed68a4ff-a2aa-4df7-96b1-f094bce4b9b7?source=api-prod

この情報の一部は Wordfence Intelligence から取得しています。 原本: https://www.wordfence.com/threat-intel/vulnerabilities/id/ed68a4ff-a2aa-4df7-96b1-f094bce4b9b7
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