How severe is CVE-2021-4436?

CVE-2021-4436 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-4436 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4436?

CVE-2021-4436 affects Wp3dprinting 3dprint Lite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4436?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2021-4436 have an EU (EUVD) identifier?

Yes. CVE-2021-4436 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34262.

When was CVE-2021-4436 published?

CVE-2021-4436 was published on 2024-02-05 and last updated on 2026-06-17.

CVE-2021-4436

CVE-2021-4436 is a critical-severity vulnerability in Wp3dprinting 3dprint Lite with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34262
Weakness: CWE-434
Affected product: Wp3dprinting 3dprint Lite
Published: 2024-02-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-4436?: 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.
How severe is CVE-2021-4436?: CVE-2021-4436 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-4436 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4436?: CVE-2021-4436 affects Wp3dprinting 3dprint Lite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4436?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2021-4436 have an EU (EUVD) identifier?: Yes. CVE-2021-4436 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34262.
When was CVE-2021-4436 published?: CVE-2021-4436 was published on 2024-02-05 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/c46ecd0d-a132-4ad6-b936-8acde3a09282/

Affected products (1)

cpe:2.3:a:wp3dprinting:3dprint_lite:*:*:*:*:*:wordpress:*:*

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