CVE-2026-4244

Description

The Post Duplicator plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `duplicate_post()` function in all versions up to, and including, 3.0.11. This is due to the function not verifying that the user has `edit_others_posts` capability before accepting a `selectedAuthorId` parameter via the `duplicate-post` REST endpoint. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicated posts attributed to any user, including administrators.

References

• https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L520
• https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L550
• https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L728
• https://plugins.trac.wordpress.org/changeset/3485579/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/64553742-ff2b-40e9-92c3-3458a9f988a2?source=cve