CVE-2026-8382 Missing authorization in Advanced Custom Fields (ACF®)
Unauthenticated attackers can modify post titles and content in WordPress posts linked to public ACF forms due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8382?
CVE-2026-8382 is a medium-severity missing authorization vulnerability in wpengine Advanced Custom Fields (ACF®), published on 31 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Advanced Custom Fields (ACF®) plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 6.8.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the post_title and post_content of any post bound to a publicly accessible acf_form() instance by injecting values into the _post_title and _post_content parameters of a form submission request.
Weakness: CWE-862
Which versions are affected by CVE-2026-8382?
How do I fix CVE-2026-8382?
No fix has been published for CVE-2026-8382 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-8382 being exploited?
There is no known exploitation of CVE-2026-8382 in the wild and no public exploit code.
Sources
Also known as GHSA-mqv8-cjf6-jmc9.