PHP Object Injection Vulnerability in Forminator Plugin by WordPress
CVE-2026-66583

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Forminator
Vendor
CVE Published:
20 August 2026

What is CVE-2026-66583?

A security vulnerability has been identified in the Forminator plugin versions up to 1.57.0, allowing unauthenticated PHP Object Injection. This flaw can potentially be exploited by malicious actors to execute arbitrary code, posing a significant risk to websites employing this plugin. Website administrators are strongly advised to upgrade to a patched version to mitigate potential threats associated with this vulnerability.

Affected Version(s)

Forminator <= 1.57.0

References

https://patchstack.com/database/wordpress/plugin/forminat...
vdb-entry

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ahmed Hassan | Patchstack Bug Bounty Program
.