CVE-2026-3897

Description

The Livemesh Addons for Beaver Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `labb_admin_ajax` AJAX action in all versions up to, and including, 3.9.2 due to missing authorization checks and insufficient input sanitization. The AJAX handler verifies a nonce but does not check user capabilities. This makes it possible for authenticated attackers with Subscriber-level access and above to modify plugin settings and inject malicious scripts that execute when administrators access the plugin settings page or when any user visits the frontend.

References

• https://plugins.trac.wordpress.org/browser/addons-for-beaver-builder/tags/3.9.2/admin/admin-ajax.php#L64
• https://plugins.trac.wordpress.org/browser/addons-for-beaver-builder/tags/3.9.2/admin/views/settings.php#L137
• https://plugins.trac.wordpress.org/browser/addons-for-beaver-builder/tags/3.9.2/includes/helper-functions.php#L248
• https://www.wordfence.com/threat-intel/vulnerabilities/id/8bc41c61-1d8a-445f-bd70-3b14a40c89d4?source=cve