Critical severity · published Oct 16, 2024
CVE-2021-4443
WordPress Mega Menu <= 2.0.6 - Arbitrary File Creation
9.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QM
QuadMenu – Mega Menu · quadlayers
through 2.0.6 · source: vendor
WM
Wordpress Mega Menu-quadmenu · Quadlayers
through 2.0.6 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4443
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4443
sh3llcon.org
https://sh3llcon.org/la-debilidad-de-wordpress/
www.acunetix.com
https://www.acunetix.com/vulnerabilities/web/wordpress-plugin-wordpress-mega-menu-quadmenu-remote-code-execution-2-0-6/
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/04003542-fd62-4587-9834-70e7fe8f08ef?source=cve
More from QuadMenu – Mega Menu
4.3
CVE-2025-2871
WordPress Mega Menu – QuadMenu <= 3.2.0 - Cross-Site Request Forgery to Limited User Meta Update