Privilege escalation in Acyba Acymailing – An Ultimate Newsletter Plugin And Marketing Automation Solution For WordPress
CVE-2026-15426
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.007 · change: +0.003
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/0c187d78-9f1d-4e55-a611-755ee…
- plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Mai…
- plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Das…
- plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Core/AcymContro…
- plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/WpInit/Router.p…
- plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Classes/MailCla…
- plugins.trac.wordpress.org/changeset/3632690/acymailing
Frequently asked questions
- What is CVE-2026-15426?
- CVE-2026-15426 is a high-severity vulnerability in Acyba Acymailing – An Ultimate Newsletter Plugin And Marketing Automation Solution For WordPress, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-08-11.
- How severe is CVE-2026-15426?
- High severity. CVSS v3 base score is 8.8 out of 10.