CVE-2021-20751: Ec cube/ec cube Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-r6qq-qc9m-98w2
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2021-20751 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Ec cube/ec cube libraries in the Packagist ecosystem. The issue involves ec-cube cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 4.0.6.

CVE-2021-20751 at a Glance

CVE Identifier CVE-2021-20751
GHSA Identifier GHSA-r6qq-qc9m-98w2
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Ec cube/ec cube
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:C/C:L/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 Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-20751

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

ec-cube/ec-cube fixed: 4.0.6 
Upgrade ec-cube/ec-cube to 4.0.6
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 ec-cube/ec-cube

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-20751, inspect your project dependencies for Ec cube/ec cube:

inspect dependencies for ec-cube/ec-cube

Analyze the terminal output to locate any version of Ec cube/ec cube in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.6), 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 Ec cube/ec cube, 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

Cross-site scripting vulnerability in EC-CUBE EC-CUBE 4.0.0 to 4.0.5-p1 (EC-CUBE 4 series) allows a remote attacker to inject an arbitrary script by leading an administrator or a user to a specially crafted page and to perform a specific operation.

CVE-2021-20751 Affected Ec cube/ec cube Versions

1 component(s)
Fixed Versions:
4.0.6
Product / Package Ecosystem Affected Versions Fixed Version
ec-cube/ec-cube
 Packagist
≥ 4.0.0
< 4.0.6
4.0.6

References

NVD — CVE-2021-20751 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20751
Ec cube/ec cube Source Repository REPOSITORY
https://github.com/EC-CUBE/ec-cube
jvn.jp/en/jp/jvn95292458/i... WEB
https://jvn.jp/en/jp/JVN95292458/index.html
www.ec-cube.net/info/weakness/weakn... WEB
https://www.ec-cube.net/info/weakness/weakness.php?id=78

Frequently Asked Questions

What is CVE-2021-20751?
CVE-2021-20751 is a security vulnerability in Ec cube/ec cube involving EC-CUBE Cross-site scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Ec cube/ec cube versions are affected?
Affected versions include releases prior to 4.0.6 across affected packages: ec-cube/ec-cube.
What version fixes CVE-2021-20751?
Upgrading to 4.0.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ec-cube/ec-cube affected?
Yes, ec-cube/ec-cube is affected in releases prior to 4.0.6. Upgrade your dependency to 4.0.6 or later.
What is the CVSS score of CVE-2021-20751?
CVE-2021-20751 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2021-20751?
CVE-2021-20751 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-2021-20751?
Run the dependency tree command: 'inspect dependencies for ec-cube/ec-cube'. 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-r6qq-qc9m-98w2",
  "modified" : "2024-04-25T20:40:20Z",
  "published" : "2022-05-24T19:06:28Z",
  "aliases" : [ "CVE-2021-20751" ],
  "summary" : "EC-CUBE Cross-site scripting vulnerability",
  "details" : "Cross-site scripting vulnerability in EC-CUBE EC-CUBE 4.0.0 to 4.0.5-p1 (EC-CUBE 4 series) allows a remote attacker to inject an arbitrary script by leading an administrator or a user to a specially crafted page and to perform a specific operation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "ec-cube/ec-cube"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.0.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.0.5-p1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-20751"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/EC-CUBE/ec-cube"
  }, {
    "type" : "WEB",
    "url" : "https://jvn.jp/en/jp/JVN95292458/index.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.ec-cube.net/info/weakness/weakness.php?id=78"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T20:40:20Z",
    "nvd_published_at" : "2021-06-28T01:15:00Z"
  }
}