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HIGH severity

CVE-2021-36040 — project-community-edition

HIGH

CVE-2021-36040 is a high-severity (CVSS 7.2) Improper Input Validation vulnerability in magento/project-community-edition. A fix is available for magento/project-community-edition — see the affected versions and patch details below.

Magento has a file extension restrictions bypass

Also known asGHSA-2pq5-gpqf-g4r3
Published
Updated
Affected
5 pkgs
Patched
2 / 5
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs87th percentile — riskier than 87% of all scored CVEsHighest risk
2.37%2.89%3.42%3.95%3.4%2.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

5 pkgs affected
🐘magento/project-community-edition🐘magento/community-edition🐘magento/community-edition🐘magento/community-edition🐘magento/community-edition

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

5 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmagento/project-community-editionall versionsNo fix
🐘Packagistmagento/community-editionall versionsNo fix
🐘Packagistmagento/community-edition≥ 2.4.2-p1&&< 2.4.2-p22.4.2-p2composer require magento/community-edition:^2.4.2-p2
🐘Packagistmagento/community-editionall versionsNo fix
🐘Packagistmagento/community-editionall versions2.3.7-p1composer require magento/community-edition:^2.3.7-p1

Affected Products

2 products · 6 configurations
Application
adobe commerceadobe
≥ 2.4.0 && ≤ 2.4.2
1 version
2.4.2
Application
magento open sourceadobe
≥ 2.4.0 && ≤ 2.4.2
1 version
2.4.2

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for magento/project-community-edition, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    A fix is available for CVE-2021-36040; check the affected-versions list above or the advisory for the patched release of magento/project-community-edition, then make sure no transitive dependency still pins the vulnerable range.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2021-36040: project-community — Fixed in 2.4.2-p2