Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload
Published Apr 7, 2026
9.8
CRITICALCVSS 3.1
EPSS 62.90%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=3.3.26
- Version
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 |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Apr 7, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Apr–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 62.90% (0.62903) | 99.18th | v5 (v2026.06.15) |
| Aug 18, 2026 | 62.90% (0.62903) | 99.13th | v5 (v2026.06.15) |
| Jul 25, 2026 | 57.81% (0.57807) | 98.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 54.25% (0.54254) | 98.88th | v5 (v2026.06.15) |
| Jun 5, 2026 | 17.41% (0.17415) | 95.20th | v4 (v2025.03.14) |
| Jun 1, 2026 | 21.97% (0.21968) | 95.87th | v4 (v2025.03.14) |
| May 19, 2026 | 24.23% (0.24230) | 96.16th | v4 (v2025.03.14) |
| May 14, 2026 | 16.43% (0.16426) | 94.94th | v4 (v2025.03.14) |
| Apr 7, 2026 | 0.08% (0.00083) | 24.13th | v4 (v2025.03.14) |
References (2)
Change history (0)
No recorded changes yet.