CVE-2021-21029

Name: CVE-2021-21029
Creator: NVD / NIST
Published: 2021-02-11T20:15:14.763+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 84.67%

Last modified Jun 17, 2026

CVE-2021-21029 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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. EPSS estimates a 84.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

84.67%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Magento	Magento	< 2.3.6
Magento	Magento	2.3.6
Magento	Magento	2.4.0
Magento	Magento	2.4.1

References

https://helpx.adobe.com/security/products/magento/apsb21-08.htmlVendor Advisory
https://helpx.adobe.com/security/products/magento/apsb21-08.htmlVendor Advisory

Timeline

Published: Feb 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21029?

How severe is CVE-2021-21029?

CVE-2021-21029 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 84.67% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21029?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21029?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST