What is CVE-2021-4443?

CVE-2021-4443 is a critical-severity vulnerability in Quadlayers Quadmenu – Mega Menu, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2024-10-16.

How severe is CVE-2021-4443?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-4443 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Quadlayers Quadmenu – Mega Menu

CVE-2021-4443

The WordPress Mega Menu plugin for WordPress is vulnerable to Arbitrary File Creation in versions up to, and including, 2.0.6 via the compiler_save AJAX action. This makes it possible for unauthenticated attackers to create arbitrary PHP files that can be used to execute malicious code.

Vulnerability class: Unrestricted File Upload

EPSS: 0.007 (48.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Quadlayers Quadmenu – Mega Menu — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-4443?: CVE-2021-4443 is a critical-severity vulnerability in Quadlayers Quadmenu – Mega Menu, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2024-10-16.
How severe is CVE-2021-4443?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-4443 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.