Is CVE-2021-21030 actively exploited?

No active exploitation of CVE-2021-21030 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21030 be exploited remotely?

Yes. CVE-2021-21030 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-21030?

CVE-2021-21030 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2021-21030

CWE-79Published: February 11, 2021· Updated: Jun 17, 2026

8.1

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 a stored cross-site scripting (XSS) in the customer address upload feature. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Exploitation of this issue requires user interaction.

NVD Source

Technical Analysis

CVE-2021-21030 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.