Advanced Custom Fields <= 6.0.7 - Authenticated (Contributor+) PHP Object Injection

8.8
Deserialization of Untrusted Data
CVE CVE-2023-1196
CVSS 8.8 (High)
Publicly Published April 3, 2023
Last Updated April 12, 2023
Researcher Nguyen Huu Do

Description

The Advanced Custom Fields plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 6.0.7 via deserialization of untrusted input in custom field values. This makes it possible for authenticated attackers, with contributor-level permissions, and above to inject a PHP Object. No POP chain appears to be present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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Vulnerability Details for Advanced Custom Fields (ACF®)

Software Type Plugin
Software Slug advanced-custom-fields (view on wordpress.org)
Patched? Yes
Remediation Update to one of the following versions, or a newer patched version: 5.12.5, 6.1.0
Affected Versions
  • <= 5.12.4
  • 6.0.0 - 6.0.7
Patched Versions
  • 5.12.5
  • 6.1.0

Recent vulnerabilities in Advanced Custom Fields (ACF®)

# Title CVE ID CVSS Researchers Date
1 Advanced Custom Fields (ACF®) <= 6.8.1 - Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' Parameters CVE-2026-8382 5.3 Sarawut Poolkhet (MisterHelloz) May 30, 2026
2 Advanced Custom Fields (ACF®) <= 6.8.1 - Missing Authorization 5.3 Sarawut Poolkhet (MisterHelloz) May 27, 2026
3 Advanced Custom Fields (ACF®) <= 6.7.0 - Unauthenticated Missing Authorization to Arbitrary Post/Page Disclosure via AJAX Field Query Parameters CVE-2026-4812 5.3 Fernando Mecozzi April 14, 2026
4 Advanced Custom Fields <= 6.4.2. - HTML Injection CVE-2025-54940 4.1 Shogo Kumamaru August 8, 2025
5 Advanced Custom Fields <= 6.3.8 & Secure Custom Fields <= 6.3.6.2 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2024-49593 4.4 Duc Luong Tran October 15, 2024
6 Advanced Custom Fields <= 6.3.8 - Authenticated (Admin+) Limited Arbitrary Function Call CVE-2024-9529 5.1 Automattic October 7, 2024
7 Advanced Custom Fields <= 6.3.5 - Authenticated Stored Cross-Site Scripting CVE-2024-45429 5.5 Ryo Sotoyama September 4, 2024
8 Advanced Custom Fields <= 6.2.10 - Authenticated (Contributor+) Arbitrary Custom Field Access CVE-2024-4565 4.3 Scott Kingsley Clark, Francesco Carlucci May 30, 2024
9 Advanced Custom Fields <= 6.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom Field CVE-2023-6701 6.4 Francesco Carlucci January 17, 2024
10 Advanced Custom Fields 6.1 - 6.1.7 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2023-40068 4.4 Satoo Nakano, Ryotaro Imamura August 3, 2023

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