ACF to REST API <= 3.3.4 - Insecure Direct Object Reference to Authenticated (Contributor+) ACF Field/Option Modification

Authorization Bypass Through User-Controlled Key
CVE CVE-2025-12030
CVSS Medium (4.3)
Publicly Published January 6, 2026
Last Updated January 7, 2026
Researcher Kai Aizen
Description

The ACF to REST API plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.3.4. This is due to insufficient capability checks in the update_item_permissions_check() method, which only verifies that the current user has the edit_posts capability without checking object-specific permissions (e.g., edit_post($id), edit_user($id), manage_options). This makes it possible for authenticated attackers, with Contributor-level access and above, to modify ACF fields on posts they do not own, any user account, comments, taxonomy terms, and even the global options page via the /wp-json/acf/v3/{type}/{id} endpoints, granted they can authenticate to the site.

References

1 affected software package

Software Type Plugin
Software Slug acf-to-rest-api (view on wordpress.org)
Patched? No
Affected Version
  • <= 3.3.4
Patched Version
This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.
License: Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy. License Detail.