RCE in Hwk-Fr Advanced Custom Fields: Extended

CVE-2025-13486

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.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.676 (99.3th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-13486: held from 0.676 to 0.676.

EPSS over last 30 days · oldest: 0.676 · newest: 0.676 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-13486?
CVE-2025-13486 is a critical-severity vulnerability in Hwk-Fr Advanced Custom Fields: Extended, classified under Code Injection. CVSS score: 9.8/10. Published 2025-12-03.
How severe is CVE-2025-13486?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-13486 known to be exploited?
7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.