CVE-2021-21015
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMagento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to an OS command injection via the customer attribute save controller. Successful exploitation could lead to arbitrary code execution by an authenticated attacker. Access to the admin console is required for successful exploitation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is an OS command injection vulnerability in Magento 2.x's customer attribute save controller. An authenticated attacker with admin console access can inject arbitrary OS commands through unsanitized input in the customer attribute functionality, leading to remote code execution on the underlying server.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2.3.6= 2.3.6= 2.4.0= 2.4.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Determine installed Magento versionRun bin/magento --version from the Magento root directory, or check the composer.json file for the magento/product-community-edition or magento/product-enterprise-edition version entryAffected if The version is 2.3.6, 2.4.0, 2.4.1, or any version lower than 2.3.6 (e.g., 2.3.5, 2.3.4, etc.)
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Verify admin access is availableCheck if the /admin or custom admin path is accessible and valid credentials exist. Review the app/etc/env.php file for the backend frontName setting to identify the admin URLAffected if Untrusted or compromised admin credentials exist, or the admin panel is accessible to unauthorized users
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Confirm customer attribute functionality is enabledLog into the admin panel and navigate to Stores > Attributes > Customer. Verify the menu is accessible and functionalAffected if The customer attribute management interface is reachable and functional for the authenticated admin user
You are affected if your Magento installation runs version 2.3.6, 2.4.0, or 2.4.1 and an authenticated admin user can access the customer attribute save functionality.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data2.3.6
Apply the official Magento security patch or upgrade to a patched version (2.4.2, 2.4.1-p1, or 2.3.7). Additionally, limit admin console access to trusted personnel and implement strict least-privilege admin user policies.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,928.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-21015 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-21015 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data