CVE-2026-87067 Forminator Forms < 1.57.2.1 - Authenticated RCE via XML-RPC PHP Object Injection
Authenticated attackers with forms-management permissions can achieve remote code execution via unsafe deserialization in the Forminator Forms WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87067?
CVE-2026-87067 is a high-severity unsafe deserialization vulnerability in Unknown Forminator Forms, published on 20 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Forminator Forms WordPress plugin before 1.57.2.1 does not restrict which classes may be instantiated when it deserialises a value taken from an XML-RPC request, allowing users who hold its forms-management permission to write a file of their choosing and execute arbitrary code. That permission belongs to an administrator by default, and to any role the site has granted it through the Forminator Forms WordPress plugin before 1.57.2.1's own settings, so the issue is reachable well below administrator on sites that use that feature.
Weakness: CWE-94
Which versions are affected by CVE-2026-87067?
How do I fix CVE-2026-87067?
No fix has been published for CVE-2026-87067 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-87067 being exploited?
There is no known exploitation of CVE-2026-87067 in the wild and no public exploit code.
Sources
Also known as GHSA-h6cq-4ghp-3r32.