# CVE-2026-15426: AcyMailing authorization bypass in notification template

Source: https://junglewise.ai/threats/cve-2026-15426-acymailing-authorization-bypass-in-notification-template  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-15426 · Severity: high · CVSS 8.8 · Published 2026-08-11

AcyMailing is a WordPress plugin that handles newsletter distribution and email marketing automation. A flaw allows authenticated subscribers to modify password-reset email templates, redirecting password-reset links for any user—including administrators—to attacker-controlled addresses. This enables account takeover if the site has configured WordPress to route emails through AcyMailing.

## Quick answers

**Is CVE-2026-15426 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15426 being exploited in the wild.

**How severe is CVE-2026-15426?** High severity, with a CVSS score of 8.8, published 11 August 2026.

**Which products and versions are affected?** AcyMailing AcyMailing up to and including 10.11.1.

**Is there a fix for CVE-2026-15426?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15426 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-15426?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an authorization bypass in the plugin's notification template handling, specifically affecting the acy_notification_cms template. The plugin fails to properly verify that an authenticated user has permission to modify email notification settings. An attacker with subscriber-level access or above can overwrite the BCC field of the password-reset notification template, causing all subsequent password-reset emails—including those for administrator accounts—to be silently copied to an attacker-controlled email address. Exploitation requires the site administrator to have enabled "Send website emails with AcyMailing," which routes WordPress core notifications through the plugin's email system. The attacker can then intercept password-reset links and take over accounts.

## Affected products

- AcyMailing AcyMailing up to and including 10.11.1

## Timeline

- 2026-08-11: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Classes/MailClass.php](https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Classes/MailClass.php)
- [https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Dashboard/Walkthrough.php](https://plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Dashboard/Walkthrough.php)