OCTOBER 7, 2026
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Case File

CVE-2026-84434

CRITICAL · CVSS 9.8 EPSS 3.91% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-19 · Last synced 2026-10-07

CyberRota Analysis

AI-Generated

The Gravity Forms plugin for WordPress is vulnerable to arbitrary file uploads due to improper validation in the upload_file function, allowing unauthenticated attackers to upload potentially executable files. This critical vulnerability could lead to remote code execution if exploited, particularly through forms with hidden file upload fields. WordPress site administrators using affected versions should prioritize immediate updates to mitigate this severe risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84434
Severity
CRITICAL
CVSS
9.8
EPSS
3.91%
WordPress

Original NVD 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.