Is CVE-2021-40188 actively exploited?

No active exploitation of CVE-2021-40188 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40188 be exploited remotely?

Yes. CVE-2021-40188 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40188?

CVE-2021-40188 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2021-40188

HIGH

CVE-2021-40188

CWE-434Published: October 11, 2021· Updated: Jun 17, 2026

7.2

CVSS v3.1

Official Description

PHPFusion 9.03.110 is affected by an arbitrary file upload vulnerability. The File Manager function in admin panel does not filter all PHP extensions such as ".php, .php7, .phtml, .php5, ...". An attacker can upload a malicious file and execute code on the server.

NVD Source

Technical Analysis

CVE-2021-40188 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.