Is CVE-2021-40189 actively exploited?

No active exploitation of CVE-2021-40189 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40189 be exploited remotely?

Yes. CVE-2021-40189 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40189?

CVE-2021-40189 has a CVSS score of 7.2 (HIGH).

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HIGH

CVE-2021-40189

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

7.2

CVSS v3.1

Official Description

PHPFusion 9.03.110 is affected by a remote code execution vulnerability. The theme function will extract a file to "webroot/themes/{Theme Folder], where an attacker can access and execute arbitrary code.

NVD Source

Technical Analysis

CVE-2021-40189 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.