CVE-2026-15426 json
AcyMailing <= 10.11.1 - Authenticated (Subscriber+) Missing Authorization to Account Takeover via Notification Template Update
published 2026-08-11 2 mo ago modified 2026-08-12 2 mo ago also EUVD-2026-56857
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | 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
Classification
- Weakness
-
- CWE-269 Improper Privilege Management
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/0c187d78-9f1d-4e55-a611-755ee30f855b?source=cve
- plugins.trac.wordpress.org /browser/acymailing/tags/10.10.2/back/Controllers/Mails/Edition.php#L344
- plugins.trac.wordpress.org /browser/acymailing/tags/10.10.2/back/Controllers/Dashboard/Walkthrough.php#L222
- plugins.trac.wordpress.org /browser/acymailing/tags/10.10.2/back/Core/AcymController.php#L99
- plugins.trac.wordpress.org /browser/acymailing/tags/10.10.2/back/WpInit/Router.php#L122
- plugins.trac.wordpress.org /browser/acymailing/tags/10.10.2/back/Classes/MailClass.php#L1496
- plugins.trac.wordpress.org /changeset/3632690/acymailing
Sources
- CVE List CVE-2026-15426
- NVD CVE-2026-15426
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.