Unauthorized Access in MetForm WordPress Plugin Allows Data Exposure
CVE-2026-86834

3.7LOW

Key Information:

Vendor

WordPress
Status
Metform
Vendor
CVE Published:
3 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86834?

The MetForm WordPress plugin prior to version 4.3.1 contains a security flaw that fails to sufficiently restrict access to a debug file created in the web root during form submissions, especially when the HubSpot Forms integration is active. This oversight permits unauthorized attackers to retrieve sensitive upstream API response data, which may include correlation identifiers and cookies, posing a significant risk to user privacy and data integrity.

Affected Version(s)

MetForm 2.2.1 < 4.3.1

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-2026-86834 - Proof of Concept

References

https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

vuxvinh
WPScan
.