CVE-2026-0740

Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload

Published Apr 7, 2026 CVSS 3.1 · 9.8 Critical EPSS 62.9% KEV · Not listed

Description

The Ninja Forms - File Uploads plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'NF_FU_AJAX_Controllers_Uploads::handle_upload' function in all versions up to, and including, 3.3.26. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability was partially patched in version 3.3.25 and fully patched in version 3.3.27.

Analysis

Technical impact

The vulnerability resides in the upload handler of the Ninja Forms - File Uploads plugin for WordPress, where missing file-type validation allows any file to be stored on the server. An attacker can exploit this to upload a malicious script or binary, paving the way for code execution and potential site takeover. The weakness is classified as CWE-434, representing an unrestricted upload of potentially dangerous file types.

Affected Systems

This issue affects all releases of the Ninja Forms - File Uploads WordPress extension supplied by SaturdayDrive up to version 3.3.26. A partial mitigation was introduced in 3.3.25, but the full fix is only available in version 3.3.27 and later.

Risk and Exploitability

With a CVSS score of 9.8 and an EPSS score of 63%, the vulnerability is severe and has a high exploitation probability. Because the upload endpoint remains publicly accessible without authentication, attackers can readily reach the vector. Once a malicious file is uploaded, code execution is possible, compromising confidentiality, integrity, and availability of the affected site.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

SaturdayDrive

Ninja Forms - File Uploads

unaffected

Version	Status	Constraints
`0`	affected	≤ 3.3.26

No data.

Vendor Product Versions

Saturdaydrive

Ninja Forms - File Uploads

Version	Status	Scheme	Platform
`[0,3.3.26]`	affected	semver	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update the Ninja Forms - File Uploads plugin to version 3.3.27 or, block the upload endpoint with a web-application firewall rule or by setting the directory to deny execution via .htaccess.
Verify that the upload directory permissions prevent execution of uploaded files and monitor the directory for unexpected files.
If an immediate upgrade is not possible, restrict upload functionality to trusted administrator roles only to minimize exposure.

Generated by OpenCVE AI on August 18, 2026 at 15:03 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 62.9% (62.903% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://ninjaforms.com/extensions/file-uploads/
https://www.wordfence.com/threat-intel/vulnerabilities/id/0b606ded-ab50-486a-9337-97ee9f452f12?source=cve

History

Apr 7, 2026 3:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Apr 7, 2026 9:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Saturdaydrive Saturdaydrive ninja Forms - File Uploads Wordpress Wordpress wordpress
Vendors & Products		Saturdaydrive Saturdaydrive ninja Forms - File Uploads Wordpress Wordpress wordpress

Apr 7, 2026 7:15 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		The Ninja Forms - File Uploads plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'NF_FU_AJAX_Controllers_Uploads::handle_upload' function in all versions up to, and including, 3.3.26. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability was partially patched in version 3.3.25 and fully patched in version 3.3.27.
Title		Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload
Weaknesses		CWE-434
References		https://ninjaforms.com/extensions/file-uploads/ https://www.wordfence.com/threat-intel/vulnerabilities/id/0b606ded-ab50-486a-9337-97ee9f452f12?source=cve
Metrics		cvssV3_1 `{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`