CVE-2026-4812 json
Advanced Custom Fields (ACF®) <= 6.7.0 - Unauthenticated Missing Authorization to Arbitrary Post/Page Disclosure via AJAX Field Query Parameters
published 2026-04-15 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-22828
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
The Advanced Custom Fields (ACF) plugin for WordPress is vulnerable to Missing Authorization to Arbitrary Post/Page Disclosure in versions up to and including 6.7.0. This is due to AJAX field query endpoints accepting user-supplied filter parameters that override field-configured restrictions without proper authorization checks. This makes it possible for unauthenticated attackers with access to a frontend ACF form to enumerate and disclose information about draft/private posts, restricted post types, and other data that should be restricted by field configuration.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected products
- wpengine Advanced Custom Fields (ACF®)
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/51e3a976-a1a3-411a-b88c-f1cb2aa8d5eb?source=cve
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L155
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L155
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L180
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L180
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L171
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L171
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L187
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L187
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-page_link.php#L144
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-page_link.php#L144
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-user.php#L435
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-user.php#L435
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L92
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L92
- plugins.trac.wordpress.org /browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L118
- plugins.trac.wordpress.org /browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L118
Sources
- CVE List CVE-2026-4812
- NVD CVE-2026-4812
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.