CVE-2026-94264: Advanced Custom Fields: Extended 0.8.9.4 - 0.9.2.7 - Contributor+ XSS via Form Shortcode Attributes

Q: Which plugin editions and versions need remediation?

Both Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO are affected before version 0.9.2.8. The stated affected version ranges are 0.8.9.4 through 0.9.2.7.

Q: What level of access does an attacker need?

An attacker needs a WordPress role as low as Contributor. They must be able to create content or otherwise use vulnerable form shortcode attributes that take values from the visitor request.

Q: Does exploitation require administrator interaction?

Yes, exploitation relies on a victim opening a crafted link or page. The resulting script can execute in the browser of that visitor, including a logged-in administrator.

Q: How does this relate to CVE-2023-5292?

This issue is described as an incomplete fix for CVE-2023-5292. The prior deny-list addressed only three HTML wrapper attributes, while other form shortcode attributes could still be populated from request-controlled values and output without escaping.

Published Oct 23, 2026

Updated

The Advanced Custom Fields: Extended WordPress plugin before 0.9.2.8, Advanced Custom Fields: Extended PRO WordPress plugin before 0.9.2.8 does not validate or escape some of its form shortcode attributes, which can be pointed at values taken from the visitor's own request and are then output without escaping, allowing users with a role as low as contributor to have arbitrary script run in the browser of anyone led to open a crafted link or page, including a logged-in administrator. This is an incomplete fix for CVE-2023-5292, whose deny-list covers only the three HTML wrapper attributes.

Affected Software

2 affected components

ACF Extended Advanced Custom Fields: Extended>=0.8.9.4<=0.9.2.7

ACF Extended Advanced Custom Fields: Extended PRO>=0.8.9.4<=0.9.2.7

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO to a version that resolves this vulnerability.
Fixed in 0.9.2.8

Event History

Oct 23, 2026

CVE Published

via MITRE·06:00 AM

Data Sourced

via MITRE·06:00 AM

DescriptionWeakness

Frequently Asked Questions

Which plugin editions and versions need remediation?

Both Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO are affected before version 0.9.2.8. The stated affected version ranges are 0.8.9.4 through 0.9.2.7.

What level of access does an attacker need?

An attacker needs a WordPress role as low as Contributor. They must be able to create content or otherwise use vulnerable form shortcode attributes that take values from the visitor request.

Does exploitation require administrator interaction?

Yes, exploitation relies on a victim opening a crafted link or page. The resulting script can execute in the browser of that visitor, including a logged-in administrator.

How does this relate to CVE-2023-5292?

This issue is described as an incomplete fix for CVE-2023-5292. The prior deny-list addressed only three HTML wrapper attributes, while other form shortcode attributes could still be populated from request-controlled values and output without escaping.

CVE-2026-94264: Advanced Custom Fields: Extended 0.8.9.4 - 0.9.2.7 - Contributor+ XSS via Form Shortcode Attributes

Affected Software

Remediation

Event History

Frequently Asked Questions

Which plugin editions and versions need remediation?

What level of access does an attacker need?

Does exploitation require administrator interaction?

How does this relate to CVE-2023-5292?

Company

Resources

Contact

Frequently Asked Questions

Which plugin editions and versions need remediation?

What level of access does an attacker need?

Does exploitation require administrator interaction?

How does this relate to CVE-2023-5292?