CVE-2021-21027: Magento/community edition Magento Cross-site Request Forgery (CSRF) Vulnerability

MODERATE
Advisory Identifier: GHSA-h4xc-577p-hgj9
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CVSS 4.3
CWE-352
Published
Advisory Summary

CVE-2021-21027 is a MODERATE (CVSS 4.3) magento cross-site request forgery (csrf) vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves magento cross-site request forgery (csrf) vulnerability via the graphql api. Remediation is available by upgrading affected packages to version 2.3.6-p1, 2.4.2.

CVE-2021-21027 at a Glance

CVE Identifier CVE-2021-21027
GHSA Identifier GHSA-h4xc-577p-hgj9
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Magento/community edition
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-21027

To remediate this vulnerability, upgrade all affected Magento/community edition dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

magento/community-edition fixed: 2.3.6-p1 
Upgrade magento/community-edition to 2.3.6-p1
magento/community-edition fixed: 2.4.2 
Upgrade magento/community-edition to 2.4.2
magento/project-community-edition fixed: Latest secure release 
Upgrade magento/project-community-edition to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for magento/community-edition

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-21027, inspect your project dependencies for Magento/community edition:

inspect dependencies for magento/community-edition

Analyze the terminal output to locate any version of Magento/community edition in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.6-p1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Magento/community edition, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are affected by a cross-site request forgery (CSRF) vulnerability via the GraphQL API. Successful exploitation could lead to unauthorized modification of customer metadata by an unauthenticated attacker. Access to the admin console is not required for successful exploitation.

CVE-2021-21027 Affected Magento/community edition Versions

3 component(s)
Fixed Versions:
2.3.6-p12.4.2
Product / Package Ecosystem Affected Versions Fixed Version
magento/community-edition
 Packagist
< 2.3.6-p1
2.3.6-p1
magento/community-edition
 Packagist
≥ 2.4.0
< 2.4.2
2.4.2
magento/project-community-edition
 Packagist
≤ 2.0.2

References

NVD — CVE-2021-21027 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21027
Security Fix Commit FIX COMMIT
https://github.com/magento/magento2/commit/a2eb7e29ea92a8bbc86c3b6b81b59d8533088497
Security Fix Commit FIX COMMIT
https://github.com/magento/magento2/commit/a349e022c9ae070e7da262021f9ef182105aa00b
Magento/community edition Source Repository REPOSITORY
https://github.com/magento/magento2
Magento/community edition Security Information SECURITY
https://helpx.adobe.com/security/products/magento/apsb21-08.html

Frequently Asked Questions

What is CVE-2021-21027?
CVE-2021-21027 is a security vulnerability in Magento/community edition involving Magento cross-site request forgery (CSRF) vulnerability via the GraphQL API under CWE-352: Cross-Site Request Forgery (CSRF).
Which Magento/community edition versions are affected?
Affected versions include releases prior to 2.3.6-p1, 2.4.2 across affected packages: magento/community-edition, magento/project-community-edition.
What version fixes CVE-2021-21027?
Upgrading to 2.3.6-p1, 2.4.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is magento/community-edition affected?
Yes, magento/community-edition is affected in releases prior to 2.3.6-p1, 2.4.2. Upgrade your dependency to 2.3.6-p1, 2.4.2 or later.
Is magento/project-community-edition affected?
Yes, magento/project-community-edition is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-21027?
CVE-2021-21027 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2021-21027?
CVE-2021-21027 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check Packagist dependencies for CVE-2021-21027?
Run the dependency tree command: 'inspect dependencies for magento/community-edition'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h4xc-577p-hgj9",
  "modified" : "2025-02-10T20:53:17Z",
  "published" : "2022-05-24T17:41:56Z",
  "aliases" : [ "CVE-2021-21027" ],
  "summary" : "Magento cross-site request forgery (CSRF) vulnerability via the GraphQL API",
  "details" : "Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are affected by a cross-site request forgery (CSRF) vulnerability via the GraphQL API. Successful exploitation could lead to unauthorized modification of customer metadata by an unauthenticated attacker. Access to the admin console is not required for successful exploitation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.6-p1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4.0"
      }, {
        "fixed" : "2.4.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/project-community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21027"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/magento/magento2/commit/a2eb7e29ea92a8bbc86c3b6b81b59d8533088497"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/magento/magento2/commit/a349e022c9ae070e7da262021f9ef182105aa00b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/magento/magento2"
  }, {
    "type" : "WEB",
    "url" : "https://helpx.adobe.com/security/products/magento/apsb21-08.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-11T19:29:35Z",
    "nvd_published_at" : "2021-02-11T20:15:00Z"
  }
}