Magento Commerce Improper Input Validation Could Lead To Remote Code Execution

published 2021-09-01 5 y ago modified 2026-06-17 4 mo ago also GHSA-2pq5-gpqf-g4r3 , EUVD-2021-22673

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.9%; EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an improper input validation vulnerability. An attacker with admin privileges can upload a specially crafted file to bypass file extension restrictions and could lead to remote code execution.

Patch / fix

fixed in 1 links 1

packagist magento/community-edition 2.3.7-p1, 2.4.2-p2

helpx.adobe.com/security/products/magento/apsb21-64.html advisory

Exploit prediction

2.87% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	magento/project-community-edition	<=2.0.2	no fix listed
packagist	magento/community-edition	1 listed version >=2.4.2-p1, <2.4.2-p2 <2.3.7-p1	2.4.2-p2 2.3.7-p1

Affected products

Adobe Magento Commerce

Classification

Weakness

CWE-20 Improper Input Validation
CWE-434 Unrestricted Upload of File with Dangerous Type

References

helpx.adobe.com /security/products/magento/apsb21-64.html
web, patch, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2021-36040
advisory
github.com /magento/magento2
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary