Critical severity · published Apr 7, 2026
CVE-2026-0740
Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload
9.8
CVSS
62.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)62.9% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
Ninja Forms - File Uploads · SaturdayDrive
through 3.3.26 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0740
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0740
ninjaforms.com
https://ninjaforms.com/extensions/file-uploads/
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/0b606ded-ab50-486a-9337-97ee9f452f12?source=cve
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