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  4. CVE 2026 86834 metform 221 430 unauthenticated debug file
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-86834

MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration

Answer in brief

CVE-2026-86834 records a Unknown severity vulnerability in MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration. The current sources do not mark it as known exploited. The current feed maps Unknown/MetForm (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 3, 2026Updated Oct 3, 2026Source checked Oct 3, 2026First seen by HOL Oct 3, 2026Material review Oct 3, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/MetForm (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/MetFormgeneric>=2.2.1 <4.3.14.3.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/MetForm.
  2. 2Review the reported fix. Update Unknown/MetForm to 4.3.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 3, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • MetForm < 4.3.1 - Unauthenticated Form Entry Data Disclosure via REST APISame unknown/metform package
  • WPZOOM Connect: AI Chat, Click to Chat, Social Icons & Share Buttons <= 4.7.3 - Unauthenticated Sensitive Information Disclosure via HMAC Signature Collision (Missing Domain Separation) in HMAC Signature Domain-Separation Flaw in `/yamidoo/v1/customer`…Also CWE-200
  • WP Ultimate CSV Importer < 9.2 - Unauthenticated Imported Data Disclosure via Predictable Log PathAlso CWE-200
  • Pie Register < 3.8.4.14 - Unauthenticated User Email Disclosure via Invitation CodeAlso CWE-200
  • Ultra Addons Lite for Elementor <= 1.3.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Type Out WidgetSame generic ecosystem
  • Rich Showcase for Google Reviews <= 7.1.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Google Review Text (imported via Places API)Same generic ecosystem

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-200
Source
CVE List V5
Source checked
Oct 3, 2026
References
1 linked source
Open source record