CVE-2026-4066 in inc2734 Smart Custom Fields Plugininfo

Summary

The Smart Custom Fields plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the relational_posts_search() function in all versions up to, and including, 5.0.6. This makes it possible for authenticated attackers, with Contributor-level access and above, to read private and draft post content from other authors via the smart-cf-relational-posts-search AJAX action. The function queries posts with post_status=any and returns full WP_Post objects including post_content, but only checks the generic edit_posts capability instead of verifying whether the requesting user has permission to read each individual post.

Responsible

Wordfence

Reservation

03/12/2026

Disclosure

03/24/2026

Entries

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerability	CWE	Exp	Cou	CVE
352651	inc2734 Smart Custom Fields Plugin relational_posts_search authorization	862	Not defined	Not defined	CVE-2026-4066

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