Vulnerabilities in pkg:npm/js-extend

PACKAGE
Advisory Identifier: GHSA-mh82-55cm-6gfh
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Advisory Summary

CVE-2021-25945 is a CRITICAL (CVSS 9.8) prototype pollution vulnerability vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Js extend libraries in the npm ecosystem. The issue involves prototype pollution vulnerability in js-extend. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/js-extend

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/js-extend. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-mh82-55cm-6gfh CVE-2021-25945 CRITICAL Prototype pollution vulnerability in js-extend

CVE-2021-25945 at a Glance

CVE Identifier CVE-2021-25945
GHSA Identifier GHSA-mh82-55cm-6gfh
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Js extend
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2021-25945

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

js-extend fixed: Latest secure release 
npm install js-extend@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: 

npm ls js-extend

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-25945, inspect your project dependencies using npm:

npm ls js-extend

Analyze the terminal output to locate any version of Js extend in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls js-extend command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. In Js extend, 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

Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

CVE-2021-25945 Affected Js extend Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
js-extend
npm/js-extend
npm
≤ 1.0.1

References

NVD — CVE-2021-25945 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-25945
Js extend Source Repository REPOSITORY
https://github.com/vmattos/js-extend
www.whitesourcesoftware.com/vulnerability-datab... WEB
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25945

Frequently Asked Questions

What is CVE-2021-25945?
CVE-2021-25945 is a security vulnerability in Js extend involving Prototype pollution vulnerability in js-extend under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Js extend versions are affected?
Affected versions include releases prior to current release patches across affected packages: js-extend.
What version fixes CVE-2021-25945?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is js-extend affected?
Yes, js-extend 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-2021-25945?
CVE-2021-25945 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-25945?
CVE-2021-25945 is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.).
How can I check npm dependencies for CVE-2021-25945?
Run the dependency tree command: 'npm ls js-extend'. 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-mh82-55cm-6gfh",
  "modified" : "2022-06-29T20:42:39Z",
  "published" : "2021-06-08T23:16:03Z",
  "aliases" : [ "CVE-2021-25945" ],
  "summary" : "Prototype pollution vulnerability in js-extend",
  "details" : "Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "js-extend"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-25945"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vmattos/js-extend"
  }, {
    "type" : "WEB",
    "url" : "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25945"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321", "CWE-915" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-27T23:04:49Z",
    "nvd_published_at" : "2021-05-26T15:15:00Z"
  }
}