What’s Vulnerable › Vulnerabilities

CVE-2026-8382: Advanced Custom Fields (ACF®) <= 6.8.1 - Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' Parameters

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-31 · updated 2026-07-22
• Weakness: CWE-862

Description

The Advanced Custom Fields (ACF®) plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 6.8.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the post_title and post_content of any post bound to a publicly accessible acf_form() instance by injecting values into the _post_title and _post_content parameters of a form submission request.

Affected products

• wpengine Advanced Custom Fields (ACF®): through 6.8.1

References

• https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.8.0/includes/forms/form-front.php#L243
• https://plugins.trac.wordpress.org/changeset/3549586/advanced-custom-fields/trunk/includes/forms/form-front.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ddb2290d-d4bd-4f70-9fe9-927f49721811?source=cve

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