NVD / CVE Program· CNA WPScan

CVE-2021-4436: 3DPrint Lite < 1.9.1.5 - Unauthenticated Arbitrary File Upload

Noroxi assessment

Priority: Plan (action score 41/100)

A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Public proof-of-concept code exists (Exploit-DB / GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 6.6% (FIRST EPSS); higher than 93.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Unknown 3DPrint Lite 1.9.1.5.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to Unknown 3DPrint Lite 1.9.1.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The 3DPrint Lite WordPress plugin before 1.9.1.5 does not have any authorisation and does not check the uploaded file in its p3dlite_handle_upload AJAX action , allowing unauthenticated users to upload arbitrary file to the web server. However, there is a .htaccess, preventing the file to be accessed on Web servers such as Apache.

CriticalCVSS 9.8 · v3.1—Proof of concept Fix available

Published: Feb 5, 2024
Updated: Jun 17, 2026
EPSS: 6.6% · 93th percentile
CWE: CWE-434

Report tools

JSON

Action score

Plan

Add it to your regular patch cycle.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 6.6%

CISA SSVC decision

Exploitation: proof of concept
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Is 3DPrint Lite on your site?

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If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
wp3dprinting	3dprint lite	cpe:2.3:a:wp3dprinting:3dprint_lite

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

wp3dprinting 3dprint litebefore 1.9.1.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (WPScan). Independent of NVD's CPE analysis and usually ahead of it.

Unknown 3DPrint Lite
- before 1.9.1.5affected · semver

Same product

wp3dprinting: all records

Other highest-scoring records for the same primary product.

CVE-2025-34303DPrint Lite <=2.1.3.6 - Authenticated (Admin+) SQL Injection via 'printer_text'
19Monitor
CVE-2025-34293DPrint Lite <=2.1.3.6 - Authenticated (Admin+) SQL Injection via 'material_text'
19Monitor
CVE-2025-34283DPrint Lite <=2.1.3.6 - Authenticated (Admin+) SQL Injection via 'coating_text'
19Monitor

Published before and after this one in the same product

Later →CVE-2024-10480Dec 6, 2024 · 3DPrint Lite < 2.1 - Settings Update via CSRF
17Monitor
Later →CVE-2025-3427Apr 8, 2025 · 3DPrint Lite <=2.1.3.6 - Authenticated (Admin+) SQL Injection via 'infill_text'
19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Unknown 3DPrint Lite	1.9.1.5	Vendor (CNA)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Nuclei detection template ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Nuclei detection template	Nuclei template CVE-2021-4436	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Spacehenfinder
WPScancoordinator

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).