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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected products
- airesvsg / ACF to REST API0 – 3.3.4
References
- MISChttps://www.wordfence.com/threat-intel/vulnerabilities/id/5ab508fa-298c-48c1-8510-f2e0a881675a?source=cve
- MISChttps://plugins.trac.wordpress.org/browser/acf-to-rest-api/tags/3.3.4/v3/lib/endpoints/class-acf-to-rest-api-controller.php#L108
- MISChttps://plugins.trac.wordpress.org/browser/acf-to-rest-api/tags/3.3.4/v3/lib/endpoints/class-acf-to-rest-api-controller.php#L120