CVE-2021-3841: Sylius/sylius Cross Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-hhvr-2q69-4563
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CVSS 4.1
CWE-79
Published
Advisory Summary

CVE-2021-3841 is a MODERATE (CVSS 4.1) cross site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Sylius/sylius libraries in the Packagist ecosystem. The issue involves cross site scripting in sylius/sylius. Remediation is available by upgrading affected packages to version 1.9.10, 1.10.11, 1.11.2.

CVE-2021-3841 at a Glance

CVE Identifier CVE-2021-3841
GHSA Identifier GHSA-hhvr-2q69-4563
Severity MODERATE
CVSS v3.1 Base Score 4.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Sylius/sylius
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L).

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

How to Fix CVE-2021-3841

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

sylius/sylius fixed: 1.9.10 
Upgrade sylius/sylius to 1.9.10
sylius/sylius fixed: 1.10.11 
Upgrade sylius/sylius to 1.10.11
sylius/sylius fixed: 1.11.2 
Upgrade sylius/sylius to 1.11.2
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 sylius/sylius

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-3841, inspect your project dependencies for Sylius/sylius:

inspect dependencies for sylius/sylius

Analyze the terminal output to locate any version of Sylius/sylius in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.9.10), 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 Sylius/sylius, 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

sylius/sylius versions prior to 1.9.10, 1.10.11, and 1.11.2 are vulnerable to stored cross-site scripting (XSS) through SVG files. This vulnerability allows attackers to inject malicious scripts that can be executed in the context of the user's browser.

CVE-2021-3841 Affected Sylius/sylius Versions

3 component(s)
Fixed Versions:
1.9.101.10.111.11.2
Product / Package Ecosystem Affected Versions Fixed Version
sylius/sylius
 Packagist
< 1.9.10
1.9.10
sylius/sylius
 Packagist
≥ 1.10.0
< 1.10.11
1.10.11
sylius/sylius
 Packagist
≥ 1.11.0
< 1.11.2
1.11.2

References

NVD — CVE-2021-3841 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3841
Security Fix Commit FIX COMMIT
https://github.com/sylius/sylius/commit/3da169e0c23e752974d74223cc536c29a2a82edc
Sylius/sylius Source Repository REPOSITORY
https://github.com/sylius/sylius
huntr.com/bounties/1625506791... WEB
https://huntr.com/bounties/1625506791178-Sylius/Sylius

Frequently Asked Questions

What is CVE-2021-3841?
CVE-2021-3841 is a security vulnerability in Sylius/sylius involving Cross site scripting in sylius/sylius under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Sylius/sylius versions are affected?
Affected versions include releases prior to 1.9.10, 1.10.11, 1.11.2 across affected packages: sylius/sylius.
What version fixes CVE-2021-3841?
Upgrading to 1.9.10, 1.10.11, 1.11.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sylius/sylius affected?
Yes, sylius/sylius is affected in releases prior to 1.9.10, 1.10.11, 1.11.2. Upgrade your dependency to 1.9.10, 1.10.11, 1.11.2 or later.
What is the CVSS score of CVE-2021-3841?
CVE-2021-3841 has a CVSS v3.1 base score of 4.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2021-3841?
CVE-2021-3841 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-2021-3841?
Run the dependency tree command: 'inspect dependencies for sylius/sylius'. 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-hhvr-2q69-4563",
  "modified" : "2024-11-15T20:41:52Z",
  "published" : "2024-11-15T12:31:44Z",
  "aliases" : [ "CVE-2021-3841" ],
  "summary" : "Cross site scripting in sylius/sylius",
  "details" : "sylius/sylius versions prior to 1.9.10, 1.10.11, and 1.11.2 are vulnerable to stored cross-site scripting (XSS) through SVG files. This vulnerability allows attackers to inject malicious scripts that can be executed in the context of the user's browser.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "sylius/sylius"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.9.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "sylius/sylius"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.10.0"
      }, {
        "fixed" : "1.10.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "sylius/sylius"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.11.0"
      }, {
        "fixed" : "1.11.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3841"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sylius/sylius/commit/3da169e0c23e752974d74223cc536c29a2a82edc"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sylius/sylius"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/1625506791178-Sylius/Sylius"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-11-15T20:41:52Z",
    "nvd_published_at" : "2024-11-15T11:15:05Z"
  }
}