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

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.

Published Apr 7, 2026Updated Apr 8, 2026Sources: cvelistV5, Wordfence

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Exploit code

public exploit, none observed

EPSS

63%

chance of exploitation in 30 days

Affects

saturdaydrive

ninja_forms_file_uploads

CVSS base

9.8

CRITICAL

CISA SSVC assessment

Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.

CISA

Exploitation

None

none · proof-of-concept · active

Automatable

Yes

can an attacker script all four kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Vendors (1)

saturdaydrive

Products (1)

ninja forms file uploads

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
9.8	CVSS 3.1	CRITICAL	—	—	cvelistV5

Weakness & attack patterns

CWE-434

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

T1574.010Hijack Execution Flow: ServicesFile Permissions Weakness

Public exploit

Capability, not use: code existing is a different claim from anyone running it.

Indexed by

exploit dbpoc in github

References

2 on the record

Elsewhere on this site

saturdaydriveevery CVE for this vendor
CWE-434other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.