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Vulnerability record · CVE-2026-15426 · published 11 August 2026

CVE-2026-15426: Improper privilege management vulnerability

The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 10.11.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the BCC field of the acy_notification_cms notification template, causing subsequent WordPress password-reset emails — including those targeting administrator accounts — to be silently copied to an attacker-controlled address, enabling account takeover via the captured reset link. Successful exploitation requires the site administrator to have enabled the "Send website emails with AcyMailing" option, which routes WordPress core notification emails through AcyMailing's templating system.

8.8 CVSS 3.1 High EPSS 0.66% · top 50.5% CWE-269 · Improper privilege management Deferred
8.8CVSS 3.1 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
12 Aug 2026Last modified by NVD

Description

The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 10.11.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the BCC field of the acy_notification_cms notification template, causing subsequent WordPress password-reset emails — including those targeting administrator accounts — to be silently copied to an attacker-controlled address, enabling account takeover via the captured reset link. Successful exploitation requires the site administrator to have enabled the "Send website emails with AcyMailing" option, which routes WordPress core notification emails through AcyMailing's templating system.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Classes/MailClass.php#L1496
https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Dashboard/Walkthrough.php#L222
https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Mails/Edition.php#L344
https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Core/AcymController.php#L99
https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/WpInit/Router.php#L122
https://plugins.trac.wordpress.org/changeset/3632690/acymailing
https://www.wordfence.com/threat-intel/vulnerabilities/id/0c187d78-9f1d-4e55-a611-755ee30f855b?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-15426), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.