Form Submission Metadata Injection in Forminator Forms Plugin by WPForm
CVE-2026-87071

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Forminator Forms
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-87071?

The Forminator Forms plugin for WordPress prior to version 1.57.2.1 is susceptible to a vulnerability that allows unauthenticated users to submit arbitrary metadata while filling out public forms. This flaw allows attackers to attach unauthorized metadata keys to form submissions, including those reserved by WordPress itself, potentially leading to information leakage or data manipulation. This vulnerability poses a significant risk to WordPress installations utilizing the affected plugin, as it can compromise the integrity of the post content created through form submissions.

Affected Version(s)

Forminator Forms 0 < 1.57.2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-87071 - Proof of Concept

References

https://wpscan.com/vulnerability/9d831b9d-c05d-4b9a-8b65-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dion Mulaj
WPScan
.