CVE-2021-21030: Magento Commerce Stored Cross-site Scripting Could Lead To Arbitrary Javascript Execution

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-11 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Adobe Magento Commerce: before 2.3.6; 2.3.6, 2.4.0, 2.4.0-p1, 2.4.1 — fixed in 2.3.6

How to fix

Upgrade to a fixed version: Adobe Magento Commerce 2.3.6. Check the vendor advisory for mitigations.

References

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