CVE-2026-1266

The Postalicious plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

• CWE-79

• https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L316
• https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L533
• https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L541
• https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L548
• https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L316
• https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L533
• https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L541
• https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L548
• https://www.wordfence.com/threat-intel/vulnerabilities/id/512c9a2f-b023-4e28-8dd8-35795e68a8b3?source=cve

Published

Jan 24, 2026

Last Modified

Jun 17, 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.
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