CVE-2026-18347

Description

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 6.1.1. 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 custom-level access and above, to read arbitrary user metadata and sensitive user record fields — including email address, assigned roles, registration date, and any user_meta values — belonging to any WordPress user including administrators, by supplying a target user ID with a user-type context to the frontend collection endpoint.

References

• https://plugins.trac.wordpress.org/browser/kirki/tags/6.0.9/includes/API/Frontend/Controllers/CollectionController.php#L97
• https://plugins.trac.wordpress.org/browser/kirki/tags/6.0.9/includes/API/Frontend/Controllers/FrontendRESTController.php#L42
• https://plugins.trac.wordpress.org/browser/kirki/tags/6.0.9/includes/API/Frontend/Controllers/FrontendRESTController.php#L82
• https://plugins.trac.wordpress.org/browser/kirki/tags/6.0.9/includes/Ajax/Users.php#L227
• https://plugins.trac.wordpress.org/browser/kirki/tags/6.0.9/includes/HelperFunctions.php#L1098