CVE-2025-12937 ACF Flexible Layouts Manager <= 1.1.6 - Missing Authorization to Unauthenticated Custom Field Update
Unauthenticated attackers can modify custom field values on posts and pages due to missing capability checks in the ACF Flexible Layouts Manager plugin.
- 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-2025-12937?
CVE-2025-12937 is a medium-severity missing authorization vulnerability in valentinpellegrin ACF Flexible Layouts Manager, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The ACF Flexible Layouts Manager plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'acf_flm_update_template_with_pasted_layout' function in all versions up to, and including, 1.1.6. This makes it possible for unauthenticated attackers to update custom field values on individual posts and pages.
Weakness: CWE-862
Which versions are affected by CVE-2025-12937?
How do I fix CVE-2025-12937?
No fix has been published for CVE-2025-12937 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-2025-12937 being exploited?
There is no known exploitation of CVE-2025-12937 in the wild and no public exploit code.
Sources
Also known as GHSA-9cg3-r62g-92w5.