CVE-2026-12428: Gamaup Blocks For Acf Fields — Display Custom Fields In The Block Editor

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

The Blocks for ACF Fields plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the get_all_values() function in the /wp-json/acf-field-blocks/v1/values REST endpoint in versions up to, and including, 1.6.2. The permission_callback only verifies the generic publish_posts capability and the handler passes a user-supplied id parameter directly to get_field_objects() without verifying that the requesting user is authorized to read the target object. This makes it possible for authenticated attackers, with Author-level access and above, to read ACF field values from arbitrary posts (including private posts, drafts, posts by other users, and other ACF-supported objects) that they should not have access to.

Affected products

• Gamaup Blocks For Acf Fields — Display Custom Fields In The Block Editor: up to and including 1.6.2

Published 2026-07-09. Last modified 2026-07-09.