CVE-2026-4812

CVE-2026-4812 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

• Severity: Medium (CVSS 3.x base score 5.3)
• EPSS exploit prediction: 1% (46th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2026-22828
• Weakness: CWE-862
• Published: 2026-04-15
• Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-4812?

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.

How severe is CVE-2026-4812?

CVE-2026-4812 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-4812 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4812?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4812 have an EU (EUVD) identifier?

Yes. CVE-2026-4812 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22828.

When was CVE-2026-4812 published?

CVE-2026-4812 was published on 2026-04-15 and last updated on 2026-06-17.

References

• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-page_link.php#L144
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L155
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L92
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L118
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L171
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L180
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L187
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-user.php#L435
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-page_link.php#L144
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L155
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L92
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L118
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L171
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L180
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L187
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-user.php#L435
• https://www.wordfence.com/threat-intel/vulnerabilities/id/51e3a976-a1a3-411a-b88c-f1cb2aa8d5eb?source=cve

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