CVE-2026-3614: Acyba Acymailing – An Ultimate Newsletter Plugin And Marketing Automation Solution For WordPress

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The AcyMailing plugin for WordPress is vulnerable to privilege escalation in all versions From 9.11.0 up to, and including, 10.8.1 due to a missing capability check on the `wp_ajax_acymailing_router` AJAX handler. This makes it possible for authenticated attackers, with Subscriber-level access and above, to access admin-only controllers (including configuration management), enable the autologin feature, create a malicious newsletter subscriber with an injected `cms_id` pointing to any WordPress user, and then use the autologin URL to authenticate as that user, including administrators.

Affected products

• Acyba Acymailing – An Ultimate Newsletter Plugin And Marketing Automation Solution For WordPress: from 9.11.0, up to and including 10.8.1

Published 2026-04-16. Last modified 2026-06-17.