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  4. CVE 2026 84434 gravity forms 3104 unauthenticated arbitrary file
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-84434

Gravity Forms <= 3.1.0.4 - Unauthenticated Arbitrary File Upload via Hidden File Upload FieldCVE-2026-84434

Answer in brief

CVE-2026-84434 records a Critical severity (CVSS 9.8) vulnerability in Gravity Forms <= 3.1.0.4 - Unauthenticated Arbitrary File Upload via Hidden File Upload Field. The current sources do not mark it as known exploited. The current feed maps Gravity Forms/Gravity Forms (generic), Gravity Forms/Gravity Forms (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 Sep 19, 2026Updated Sep 21, 2026Source checked Nov 3, 2026First seen by HOL Sep 19, 2026Material review Sep 21, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.8. 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 Gravity Forms/Gravity Forms (generic), Gravity Forms/Gravity Forms (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Gravity Forms/Gravity Formsgeneric0Not reported
Gravity Forms/Gravity Formsgeneric>=0 <=3.1.0.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Gravity Forms/Gravity Forms, Gravity Forms/Gravity Forms.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 19, 2026

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

  2. Source modified

    Sep 21, 2026

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

  3. First seen by HOL

    Sep 19, 2026

Sources and claim methodology

  • Source referencedocs.gravityforms.com
  • Source referencewordfence.com
Upstream source description

The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.1.0.4 via the upload_file function. This is due to a mismatch between the field validation pipeline and the file persistence pipeline, where hidden file upload fields bypass extension validation and a rejected file's intact upload state is later passed to upload_file() without re-validation. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. Exploitation requires the targeted form to contain a File Upload field with its Visibility set to 'Hidden'; the vulnerability is reachable by unauthenticated attackers on any publicly accessible form meeting this condition.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Advanced Custom Fields: Extended PRO <= 0.9.2.6 - Unauthenticated Remote Code Execution via Dynamic Render Field TypeAlso CWE-434

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-434
Source
CVE List V5
Source checked
Nov 3, 2026
References
2 linked sources
Open source record