CVE-2026-15426
AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update
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.
| CWE | CWE-269 |
| Vendor | acyba |
| Product | acymailing – an ultimate newsletter plugin and marketing automation solution for wordpress |
| Published | Aug 11, 2026 |
Get instant alerts for acyba acymailing – an ultimate newsletter plugin and marketing automation solution for wordpress
Be the first to know when new high vulnerabilities affecting acyba acymailing – an ultimate newsletter plugin and marketing automation solution for wordpress are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H