# CVE-2026-94267: Advanced Custom Fields: Extended unauthenticated RCE in post update

Source: https://junglewise.ai/threats/cve-2026-94267-the-advanced-custom-fields-extended-wordpress-plugin-before-0-9-2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-23. Updated: 2026-10-23  
License: CC BY 4.0 with a link back

CVE-2026-94267 · Severity: info · Published 2026-10-23

Advanced Custom Fields: Extended is a WordPress plugin that allows site administrators to create custom data fields and forms. The plugin fails to verify user permissions when processing front-end forms that update posts, allowing unauthenticated visitors to modify arbitrary posts—including posts that store the site's field definitions. By exploiting this, an attacker can achieve arbitrary code execution on the web server.

Technologies: [Delicious Brains Advanced Custom Fields: Extended](https://junglewise.ai/threats/technologies/delicious-brains-advanced-custom-fields-extended), [Delicious Brains Advanced Custom Fields: Extended PRO](https://junglewise.ai/threats/technologies/advanced-custom-fields-extended-pro). Vendors: [Delicious Brains](https://junglewise.ai/threats/vendors/delicious-brains).

## Quick answers

**Is CVE-2026-94267 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-94267 being exploited in the wild.

**How severe is CVE-2026-94267?** Informational severity, published 23 October 2026.

**Which products and versions are affected?** Delicious Brains Advanced Custom Fields: Extended before 0.9.2.8; Delicious Brains Advanced Custom Fields: Extended PRO before 0.9.2.8.

**Is there a fix for CVE-2026-94267?** Yes: fixed in 0.9.2.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-94267 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-94267?** Check whether you run Delicious Brains Advanced Custom Fields: Extended or Delicious Brains Advanced Custom Fields: Extended PRO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.9.2.8

## Technical details

The plugin lacks capability checks in its front-end post-update action handlers, permitting unauthenticated attackers to overwrite arbitrary post content via visitor-supplied values. Exploitation requires a published form configured to map both its target post and content to user input. This enables modification of posts containing field definitions, leading to remote code execution.

## Affected products

- Delicious Brains Advanced Custom Fields: Extended before 0.9.2.8
- Delicious Brains Advanced Custom Fields: Extended PRO before 0.9.2.8

## Timeline

- 2026-10-21: disclosed
- 2026-10-23: advisory

## References

- [https://wpscan.com/vulnerability/9c8f45c1-cd85-4a9c-be77-88801d8143ce/](https://wpscan.com/vulnerability/9c8f45c1-cd85-4a9c-be77-88801d8143ce/)

## Related threats

- [Advanced Custom Fields: Extended sensitive information exposure via template injection](https://junglewise.ai/threats/cve-2026-110305-the-advanced-custom-fields-extended-plugin-for-wordpress-is)
- [Advanced Custom Fields: Extended authorization bypass in AJAX handlers](https://junglewise.ai/threats/cve-2026-2839-the-advanced-custom-fields-extended-plugin-for-wordpress-is)
- [Advanced Custom Fields Extended privilege escalation in front-end Forms](https://junglewise.ai/threats/cve-2026-94268-the-advanced-custom-fields-extended-wordpress-plugin-before-0-9-2)
- [Advanced Custom Fields: Extended XSS in form shortcode attributes](https://junglewise.ai/threats/cve-2026-94264-the-advanced-custom-fields-extended-wordpress-plugin-before-0-9-2)
- [Advanced Custom Fields: Extended account takeover in user update](https://junglewise.ai/threats/cve-2026-94262-the-advanced-custom-fields-extended-wordpress-plugin-before-0-9-2)