CVE-2012-4421: WordPress

Medium severity, CVSS 4.0. EPSS: 1.9% chance of exploitation in the next 30 days.

The create_post function in wp-includes/class-wp-atom-server.php in WordPress before 3.4.2 does not perform a capability check, which allows remote authenticated users to bypass intended access restrictions and publish new posts by leveraging the Contributor role and using the Atom Publishing Protocol (aka AtomPub) feature.

Affected products

• WordPress WordPress: up to and including 3.4.1; version 0.71 only; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.1.1 only; …

Published 2012-09-14. Last modified 2026-06-16.