AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update
Summary
| CVE | CVE-2026-15426 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-11 19:17:20 UTC |
| Updated | 2026-08-12 21:00:52 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.003530000 probability, percentile 0.282380000 (date 2026-08-14)
Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Acyba | AcyMailing An Ultimate Newsletter Plugin And Marketing Automation Solution For WordPress | affected 10.11.1 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.wordfence.com/threat-intel/vulnerabilities/id/0c187d78-9f1d-4e55-a611-755ee... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Dashboard/Wa... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/WpInit/Router.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Core/AcymController.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Classes/MailClass.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acymailing/tags/10.10.2/back/Controllers/Mails/Editio... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3632690/acymailing | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: d.v4n_s3c (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-10T16:47:29.000Z | Vendor Notified |
| CNA | 2026-08-11T06:12:22.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.