{"id":"CVE-2026-92537","title":"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 registe…","summary":"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 registe…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-522"],"vendor":"satollo","product":"Newsletter – Send awesome emails from WordPress","affected":["newsletter_send_awesome_emails_from_wordpress <= 9.3.9"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T03:16:59.667","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92537","references":[{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/includes/module-base.php#L1209","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/includes/module-base.php#L441","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/includes/module.php#L403","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/statistics/statistics.php#L107","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/statistics/statistics.php#L174","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.9/statistics/statistics.php#L335","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=&new=3709894%40newsletter%2Ftags%2F9.4.0&old=3695457%40newsletter%2Ftags%2F9.3.9","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/ed68a4ff-a2aa-4df7-96b1-f094bce4b9b7?source=cve","label":"security@wordfence.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-01T03:36:04.806Z","slug":"CVE-2026-92537","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}