CVE-2026-15426
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
The AcyMailing plugin for WordPress up to version 10.11.1 has an authorization bypass vulnerability. An authenticated attacker with subscriber-level access can overwrite the BCC field of the acy_notification_cms notification template, causing WordPress password reset emails, including those for administrators, to be silently copied to an attacker-controlled address, enabling account takeover.
Risk Assessment
The attack can lead to administrator account takeover by intercepting password reset links, posing a serious threat to the security of the entire WordPress installation.
Recommendation
Update the plugin to the latest version immediately and disable the option to send WordPress emails through AcyMailing if not necessary.
Other vulnerabilities in AcyMailing
See all- CVE-2026-102562High
The AcyMailing plugin for WordPress in versions up to and including 11.1.0 is vulnerable to Stored Cross-Site Scripting via the customField[] parameter of the public frontusers::subscribe endpoint. The acym_cleanVar() sanitizer only strips complete HTML tags, and SubscriberInsertion::replaceUserInformation() together with the archive view template insert the stored subscriber field value into the mail body without HTML encoding. This allows an unauthenticated attacker to inject arbitrary scripts that execute when the online-archive URL for the poisoned subscriber is accessed.
- CVE-2026-77807High
The AcyMailing plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 11.0.4 via the `user[name]` parameter. This allows unauthenticated attackers to read arbitrary files on the server. Exploitation requires the "Embed images" option to be enabled.
- CVE-2026-56292High
A SQL Injection vulnerability in the AcyMailing extension for Joomla versions below 10.11.1 allows unauthorized database access and data leakage.
- CVE-2026-12170Medium
The AcyMailing plugin for WordPress up to version 10.10.2 is vulnerable to Stored Cross-Site Scripting via the 'alignment' attribute due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts that execute whenever a user accesses an injected page.
Original NVD description (English source)
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 data from NVD (NIST) · CISA KEV · EPSS