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WordPress plugin

Advanced Custom Fields: Extended 0.9.0.5 — 0.9.1.1 - Unauthenticated Remote Code Execution in prepare_form

CVE-2025-13486Published · Updated

Action summary

Affected: 0.9.0.5 – 0.9.1.1Update to 0.9.2 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-94 Improper Control of Generation of Code
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Advanced Custom Fields: Extended acf-extended

  1. Affected0.9.0.5 – 0.9.1.1
  2. Patched in0.9.2

Update to 0.9.2 or newer.

You are affected if you run 0.9.0.5 – 0.9.1.1. Version 0.9.2 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Advanced Custom Fields: Extended.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 0.9.2, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Advanced Custom Fields: Extended to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Marcin Dudek (dudekmar).

The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Remote Code Execution in versions 0.9.0.5 through 0.9.1.1 via the prepare_form() function. This is due to the function accepting user input and then passing that through call_user_func_array(). This makes it possible for unauthenticated attackers to execute arbitrary code on the server, which can be leveraged to inject backdoors or create new administrative user accounts.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Advanced Custom Fields: Extended

All 20
More vulnerabilities in Advanced Custom Fields: Extended
SeverityVulnerabilityCVEPublished
High7.5Unauthenticated Sensitive Information Exposure in 'acf[<mapped_field>]' Parameter via {get_user} Template Tag Injection
≤0.9.2.7Update to 0.9.2.8
CVE-2026-110305
Medium5.3Missing Authorization to Unauthenticated Data Exposure via Multiple AJAX Endpoints
≤0.9.2.7Update to 0.9.2.8
CVE-2026-2839
Medium4.8Missing Authorization to Unauthenticated Arbitrary Attachment Deletion via Email Action Dynamic File Field
≤0.9.2.6Update to 0.9.2.7
CVE-2026-10752
Critical9.8Unauthenticated Privilege Escalation via Account Takeover
0.9.2.7 – 0.9.2.7Update to 0.9.2.8
CVE-2026-94268
High7.3Unauthenticated Arbitrary Non-Admin Account Takeover
0.9.2.7 – 0.9.2.7Update to 0.9.2.8
CVE-2026-94262

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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