---
id: CVE-2026-86834
title: >-
  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 ups…
summary: >-
  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 ups…
severity: none
cwe:
  - CWE-200
product: MetForm
affected:
  - MetForm >= 2.2.1 < 4.3.1
published: '2026-10-03'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T06:16:44.013'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86834'
references:
  - url: 'https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-7289b5829638/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-03T06:39:57.564Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.