CVE-2026-15426highCWE-269

CVE-2026-15426: high-severity vulnerability in acyba AcyMailing – An Ultimate Newsletter…

AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update

Published · Updated

Follow this CVE+ Monitor AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.7%
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
Affected products
acyba · AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress
Related CVEs — acyba AcyMailing – An Ultimate Newsletter…

In the same product, most dangerous first.

CVE-2024-7384HIGHAcyMailing <= 9.7.2 - Authenticated (Subscriber+) Arbitrary File Upload via acym_extractArchive FunctionEPSS 1.0%CVE-2026-77807HIGHAcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress <= 11.0.4 - Unauthenticated Arbitrary File Read via 'user[name]' ParameterEPSS 0.9%CVE-2026-3614HIGHAcyMailing 9.11.0 - 10.8.1 - Missing Authorization to Authenticated (Subscriber+) Privilege EscalationEPSS 0.4%CVE-2026-12170MEDIUMAcyMailing <= 10.10.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'alignment' AttributeEPSS 0.3%CVE-2026-5200HIGHAcyMailing <= 10.8.2 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation via 'acymailing_router'EPSS 0.3%CVE-2026-102562HIGHAcyMailing <= 11.1.0 - Unauthenticated Stored Cross-Site Scripting via 'customField[]' ParameterEPSS 0.2%