CVE-2026-12757

The The Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.9.27. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.

• CWE-94

• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.22/lite/includes/classes/class-es-handle-subscription.php#L165
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.22/lite/includes/classes/class-es-handle-subscription.php#L260
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.22/lite/includes/classes/class-es-mailer.php#L1133
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.22/lite/includes/workflows/actions/class-es-action-send-email.php#L188
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.26/lite/includes/classes/class-es-handle-subscription.php#L165
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.26/lite/includes/classes/class-es-handle-subscription.php#L260
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.26/lite/includes/classes/class-es-mailer.php#L1133
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.26/lite/includes/workflows/actions/class-es-action-send-email.php#L188
• https://www.wordfence.com/threat-intel/vulnerabilities/id/6d9b4448-2b63-4704-ac9e-c4db4784638c?source=cve

Published

Sep 7, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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