CVE-2021-37710: Shopware/core Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-fc38-mxwr-pfhx
Share
CVSS 8.0
CWE-79
Published
Advisory Summary

CVE-2021-37710 is a HIGH (CVSS 8.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Shopware/core libraries in the Packagist ecosystem. The issue involves cross-site scripting via svg media files. Remediation is available by upgrading affected packages to version 6.4.3.1.

CVE-2021-37710 at a Glance

CVE Identifier CVE-2021-37710
GHSA Identifier GHSA-fc38-mxwr-pfhx
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Shopware/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.0

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-37710

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

shopware/core fixed: 6.4.3.1 
Upgrade shopware/core to 6.4.3.1
shopware/platform fixed: 6.4.3.1 
Upgrade shopware/platform to 6.4.3.1
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 shopware/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-37710, inspect your project dependencies for Shopware/core:

inspect dependencies for shopware/core

Analyze the terminal output to locate any version of Shopware/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.4.3.1), 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 Shopware/core, 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

### Impact Cross-Site Scripting via SVG media files ### Patches We recommend updating to the current version 6.4.3.1. You can get the update to 6.4.3.1 regularly via the Auto-Updater or directly via the download overview. https://www.shopware.com/en/download/#shopware-6 ### Workarounds For older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.

CVE-2021-37710 Affected Shopware/core Versions

2 component(s)
Fixed Versions:
6.4.3.1
Product / Package Ecosystem Affected Versions Fixed Version
shopware/core
 Packagist
< 6.4.3.1
6.4.3.1
shopware/platform
 Packagist
< 6.4.3.1
6.4.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/shopware/platform/security/advisories/GHSA-fc38-mxwr-pfhx
NVD — CVE-2021-37710 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-37710
Security Fix Commit FIX COMMIT
https://github.com/shopware/platform/commit/abe9f69e1f667800f974acccd3047b4930e4b423
Shopware/core Source Repository REPOSITORY
https://github.com/shopware/platform

Frequently Asked Questions

What is CVE-2021-37710?
CVE-2021-37710 is a security vulnerability in Shopware/core involving Cross-Site Scripting via SVG media files under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Shopware/core versions are affected?
Affected versions include releases prior to 6.4.3.1 across affected packages: shopware/core, shopware/platform.
What version fixes CVE-2021-37710?
Upgrading to 6.4.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is shopware/core affected?
Yes, shopware/core is affected in releases prior to 6.4.3.1. Upgrade your dependency to 6.4.3.1 or later.
Is shopware/platform affected?
Yes, shopware/platform is affected in releases prior to 6.4.3.1. Upgrade your dependency to 6.4.3.1 or later.
What is the CVSS score of CVE-2021-37710?
CVE-2021-37710 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-37710?
CVE-2021-37710 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-2021-37710?
Run the dependency tree command: 'inspect dependencies for shopware/core'. 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-fc38-mxwr-pfhx",
  "modified" : "2021-08-23T17:24:12Z",
  "published" : "2021-08-23T19:43:00Z",
  "aliases" : [ "CVE-2021-37710" ],
  "summary" : "Cross-Site Scripting via SVG media files",
  "details" : "### Impact\nCross-Site Scripting via SVG media files\n\n### Patches\nWe recommend updating to the current version 6.4.3.1. You can get the update to 6.4.3.1 regularly via the Auto-Updater or directly via the download overview.\n\nhttps://www.shopware.com/en/download/#shopware-6\n\n### Workarounds\nFor older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "shopware/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.4.3.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 6.4.3.0"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "shopware/platform"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.4.3.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 6.4.3.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/shopware/platform/security/advisories/GHSA-fc38-mxwr-pfhx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-37710"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/shopware/platform/commit/abe9f69e1f667800f974acccd3047b4930e4b423"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/shopware/platform"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-23T17:24:12Z",
    "nvd_published_at" : "2021-08-16T23:15:00Z"
  }
}