CVE-2021-21020

Name: CVE-2021-21020
Creator: NVD / NIST
Published: 2021-02-11T20:15:14.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.42%

Last modified Jun 17, 2026

CVE-2021-21020 is a vulnerability of currently unknown severity. Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to an access control bypass vulnerability in the Login as Customer module. Successful exploitation could lead to unauthorized access to restricted resources.. EPSS estimates a 2.42% 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 vulnerable to an access control bypass vulnerability in the Login as Customer module. Successful exploitation could lead to unauthorized access to restricted resources.

Metrics

EPSS Probability

2.42%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

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-2021-21020?

How severe is CVE-2021-21020?

Severity scoring for CVE-2021-21020 is pending analysis. The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21020?

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-2021-21020?

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

Scan your code now

Source: NVD / NIST