CVE-2026-4091

The OPEN-BRAIN plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.5.0. This is due to missing nonce verification on the settings form in the func_page_main() function. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

• CWE-352

• https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L237
• https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252
• https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253
• https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272
• https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L237
• https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252
• https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253
• https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272
• https://www.wordfence.com/threat-intel/vulnerabilities/id/93df6480-9bb1-4f5d-bb39-ff1a01d739cf?source=cve

Published

Apr 15, 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.
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