# CVE-2025-13486: Advanced Custom Fields: Extended 0.9.0.5 - 0.9.1.1 - Unauthenticated Remote Code Execution in prepare_form

> Unauthenticated attackers can execute arbitrary code on the server via the prepare_form function in the Advanced Custom Fields: Extended plugin.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Dec 2025
- **Updated:** 3 Dec 2025
- **Also known as:** GHSA-8q8p-fv92-864w

## What is CVE-2025-13486?

CVE-2025-13486 is a critical code injection vulnerability in hwk-fr Advanced Custom Fields: Extended, published on 3 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2025-13486?


## How do I fix CVE-2025-13486?

No fix has been published for CVE-2025-13486 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-13486 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13486 exists.

Public exploit code:

- POC for CVE-2025-13486  (github_poc): https://github.com/0xanis/CVE-2025-13486-POC
- 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. (github_poc): https://github.com/MataKucing-OFC/CVE-2025-13486
- Advanced Custom Fields Extended (ACFE) WordPress Plugin Exploit RCE - Admin Creation (github_poc): https://github.com/0xgh057r3c0n/CVE-2025-13486
- CVE-2025-13486 - Remote Code Execution & Privilege Escalation exploit (github_poc): https://github.com/whattheslime/CVE-2025-13486
- WordPress ACF Extended Unauthenticated RCE via prepare_form() (metasploit)
- Vulnerable setup for CVE-2025-13486 - Advanced Custom Fields: Extended - Remote Code Execution  (github_poc): https://github.com/0xnemian/CVE-2025-13486.-CVE-2025-13486

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-13486 and fix it if it is affected.

What it is: CVE-2025-13486 is a critical code injection vulnerability in hwk-fr Advanced Custom Fields: Extended, published on 3 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13486 exists.

Affected product: hwk-fr Advanced Custom Fields: Extended. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-13486/ (Markdown: https://insights.sbomify.com/CVE-2025-13486/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-13486
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-13486
- OSV: https://osv.dev/vulnerability/CVE-2025-13486

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-13486/
Summaries are generated and may contain mistakes; the official description above is the record.