Is CVE-2021-21018 actively exploited?

No active exploitation of CVE-2021-21018 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21018 be exploited remotely?

Yes. CVE-2021-21018 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-21018?

CVE-2021-21018 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2021-21018

CWE-78Published: February 11, 2021· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to OS command injection via the scheduled operation module. Successful exploitation could lead to arbitrary code execution by an authenticated attacker. Access to the admin console is required for successful exploitation.

NVD Source

Technical Analysis

CVE-2021-21018 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 9.1.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.