Blocks for ACF Fields <= 1.6.2 - Missing Authorization to Authenticated (Author+) Arbitrary ACF Field Value Disclosure via 'id' Parameter
Summary
| CVE | CVE-2026-12428 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-09 11:16:24 UTC |
| Updated | 2026-07-09 16:19:45 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.002850000 probability, percentile 0.203810000 (date 2026-07-13)
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | DECLARED | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Gamaup | Blocks For ACF Fields Display Custom Fields In The Block Editor | affected 1.6.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.6.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/fc48f75d-a2e8-49ea-9bfa-a27a6... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.5.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.6.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.6.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.5.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/acf-field-blocks/tags/1.5.0/inc/class-rest.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: thinnawarth mathuros (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-08T20:36:42.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.