CVE-2026-86834 - Vulnerability Details - OpenCVE

The MetForm WordPress plugin before 4.3.1 does not properly restrict access to a debug file it writes to the web root on every form submission when its HubSpot Forms integration is enabled, allowing unauthenticated attackers to read upstream API response data, including correlation identifiers and cookies.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Wordpress-extensions	Metform

No data.

No data.

References

Link	Providers
https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-7289b5829638/

History

Sun, 04 Oct 2026 22:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Wordpress-extensions Wordpress-extensions metform
Vendors & Products		Wordpress-extensions Wordpress-extensions metform

Sat, 03 Oct 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sat, 03 Oct 2026 07:45:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-200

Sat, 03 Oct 2026 06:15:00 +0000

Type	Values Removed	Values Added
Description		The MetForm WordPress plugin before 4.3.1 does not properly restrict access to a debug file it writes to the web root on every form submission when its HubSpot Forms integration is enabled, allowing unauthenticated attackers to read upstream API response data, including correlation identifiers and cookies.
Title		MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration
References		https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-7289b5829638/

MITRE

Status: PUBLISHED

Assigner: WPScan

Published: 2026-10-03T06:00:26.480Z

Updated: 2026-10-03T15:12:21.948Z

Reserved: 2026-09-08T14:33:20.926Z

Link: CVE-2026-86834

Vulnrichment

Updated: 2026-10-03T15:01:39.876Z

NVD

Status : Deferred

Published: 2026-10-03T06:16:44.013

Modified: 2026-10-06T15:18:12.170

Link: CVE-2026-86834

Redhat

No data.

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