CVE-2021-4443: Quadlayers Quadmenu – Mega Menu

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Quadlayers Quadmenu – Mega Menu: up to and including 2.0.6
• Quadlayers WordPress Mega Menu-Quadmenu: up to and including 2.0.6

Published 2024-10-16. Last modified 2026-06-17.