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TI-2026-58026 Aliases CVE-2026-84434GHSA-x9x4-5g6j-pvj3

Gravity Forms <= 3.1.0.4 - Unauthenticated Arbitrary File Upload via Hidden File Upload Field

Priority MEDIUM 55CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0391 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Gravity FormsGravity Formsup to 3.1.0.4—No fix listedCNA
  • Gravity Forms VendorGravity Forms Affected up to 3.1.0.4 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84434
  2. 2026-10-03 Alias added: GHSA-x9x4-5g6j-pvj3
  3. 2026-10-07 EPSS moved to the 90th–95th percentile

References

Other 2

  • TI-2025-11329 Gravity Forms <= 2.9.20 - Unauthenticated Arbitrary File Upload via 'copy_post_image' CVSS 3.1CRITICAL 9.8
  • TI-2026-82952 PHP object injection in Gravity Forms via Post Custom Field CVSS 3.1CRITICAL 9.8
  • TI-2023-13292 WordPress Gravity Forms Plugin <= 2.7.3 is vulnerable to PHP Object Injection CVSS 3.1CRITICAL 9.8
  • TI-2026-11059 Gravity Forms <= 2.10.4 - Unauthenticated Arbitrary File Read via 'gform_uploaded_files' Parameter CVSS 3.1HIGH 7.5
  • TI-2026-15885 Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Upload via State/Chunk Hash Confusion CVSS 3.1HIGH 8.1
  • TI-2026-13895 Gravity Forms <= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via Post Body Field Value CVSS 3.1HIGH 7.2
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences