CVE-2021-21029: Magento Commerce Reflected Cross-site Scripting Vulnerability Could Lead To Arbitrary JavaScript Execution

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 84.6% 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 affected by a Reflected Cross-site Scripting vulnerability via 'file' parameter. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Access to the admin console is required for successful exploitation.

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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