CVE-2021-21030: Magento/community edition Cross-Site Scripting Vulnerability

Q: What is CVE-2021-21030?

CVE-2021-21030 is a security vulnerability in Magento/community edition involving Magento stored cross-site scripting (XSS) in the customer address upload feature under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').

Q: Which Magento/community edition versions are affected?

Affected versions include releases prior to 2.3.6, 2.4.1-p1 across affected packages: magento/community-edition, magento/project-community-edition.

Q: What version fixes CVE-2021-21030?

Upgrading to 2.3.6, 2.4.1-p1 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is magento/community-edition affected?

Yes, magento/community-edition is affected in releases prior to 2.3.6, 2.4.1-p1. Upgrade your dependency to 2.3.6, 2.4.1-p1 or later.

Q: 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.

Q: What is the CVSS score of CVE-2021-21030?

CVE-2021-21030 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Q: What CWE is associated with CVE-2021-21030?

CVE-2021-21030 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).

Q: How can I check Packagist dependencies for CVE-2021-21030?

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.

HIGH

Advisory Identifier: GHSA-6988-g89m-27vf

CVSS 8.1

CWE-79

Published 2022-05-24

Advisory Summary

CVE-2021-21030 is a HIGH (CVSS 8.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves magento stored cross-site scripting (xss) in the customer address upload feature. Remediation is available by upgrading affected packages to version 2.3.6, 2.4.1-p1.

CVE-2021-21030 at a Glance

CVE Identifier CVE-2021-21030

GHSA Identifier GHSA-6988-g89m-27vf

Severity HIGH

CVSS v3.1 Base Score 8.1

CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Product Magento/community edition

Package Ecosystem Packagist

Published Date 2022-05-24

Last Updated 2025-02-10

Security Impact

CVSS: 8.1

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:H/I:H/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 High (C:H)

Integrity High (I:H)

Availability None (A:N)

How to Fix CVE-2021-21030

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

Upgrade magento/community-edition to 2.3.6

magento/community-edition fixed: 2.4.1-p1

Upgrade magento/community-edition to 2.4.1-p1

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-2021-21030, 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), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. 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 vulnerable to a stored cross-site scripting (XSS) in the customer address upload feature. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Exploitation of this issue requires user interaction.

CVE-2021-21030 Affected Magento/community edition Versions

3 component(s)

Fixed Versions:

2.3.62.4.1-p1

Product / Package	Ecosystem	Affected Versions	Fixed Version
magento/community-edition	Packagist	< 2.3.6	2.3.6
magento/community-edition	Packagist	≥ 2.4.0 < 2.4.1-p1	2.4.1-p1
magento/project-community-edition	Packagist	≤ 2.0.2

References

NVD — CVE-2021-21030 NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-21030

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-2021-21030?

CVE-2021-21030 is a security vulnerability in Magento/community edition involving Magento stored cross-site scripting (XSS) in the customer address upload feature under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').

Which Magento/community edition versions are affected?

Affected versions include releases prior to 2.3.6, 2.4.1-p1 across affected packages: magento/community-edition, magento/project-community-edition.

What version fixes CVE-2021-21030?

Upgrading to 2.3.6, 2.4.1-p1 (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, 2.4.1-p1. Upgrade your dependency to 2.3.6, 2.4.1-p1 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-2021-21030?

CVE-2021-21030 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

What CWE is associated with CVE-2021-21030?

CVE-2021-21030 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).

How can I check Packagist dependencies for CVE-2021-21030?

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-6988-g89m-27vf",
  "modified" : "2025-02-10T20:54:46Z",
  "published" : "2022-05-24T17:41:56Z",
  "aliases" : [ "CVE-2021-21030" ],
  "summary" : "Magento stored cross-site scripting (XSS) in the customer address upload feature",
  "details" : "Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to a stored cross-site scripting (XSS) in the customer address upload feature. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Exploitation of this issue requires user interaction.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4.0"
      }, {
        "fixed" : "2.4.1-p1"
      } ]
    } ]
  }, {
    "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-2021-21030"
  }, {
    "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-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-10T16:47:54Z",
    "nvd_published_at" : "2021-02-11T20:15:00Z"
  }
}

CVSS V3

8.1 HIGH