Is CVE-2021-4443 actively exploited?

Yes. CVE-2021-4443 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-4443 be exploited remotely?

The attack vector of CVE-2021-4443 has not been classified yet.

What is the CVSS score of CVE-2021-4443?

CVE-2021-4443 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-4443

UNKNOWNCISA KEVIN THE WILD

CVE-2021-4443

Published: April 11, 2026

EPSS:2.26%probability of exploitation in 30 daysPercentile:84.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-4443 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-4443 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.