Vulnerabilities in pkg:npm/strong-nginx-controller

PACKAGE
Advisory Identifier: GHSA-4v9w-pvwr-38h3
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Advisory Summary

CVE-2020-7621 is a CRITICAL (CVSS 9.8) os command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Strong nginx controller libraries in the npm ecosystem. The issue involves os command injection in strong-nginx-controller. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/strong-nginx-controller

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-4v9w-pvwr-38h3 CVE-2020-7621 CRITICAL OS Command Injection in strong-nginx-controller

CVE-2020-7621 at a Glance

CVE Identifier CVE-2020-7621
GHSA Identifier GHSA-4v9w-pvwr-38h3
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Strong nginx controller
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-2020-7621

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

strong-nginx-controller fixed: Latest secure release 
npm install strong-nginx-controller@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 strong-nginx-controller

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-7621, inspect your project dependencies using npm:

npm ls strong-nginx-controller

Analyze the terminal output to locate any version of Strong nginx controller 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 strong-nginx-controller 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Strong nginx controller, 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

strong-nginx-controller through 1.0.2 is vulnerable to Command Injection. It allows execution of arbitrary command as part of the '_nginxCmd()' function.

CVE-2020-7621 Affected Strong nginx controller Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
strong-nginx-controller
npm/strong-nginx-controller
npm
≤ 1.0.2

References

NVD — CVE-2020-7621 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7621
Strong nginx controller Source Repository REPOSITORY
https://github.com/strongloop/strong-nginx-controller/blob/master/lib/server.js#L65
snyk.io/vuln/snyk-js-strong... WEB
https://snyk.io/vuln/SNYK-JS-STRONGNGINXCONTROLLER-564248

Frequently Asked Questions

What is CVE-2020-7621?
CVE-2020-7621 is a security vulnerability in Strong nginx controller involving OS Command Injection in strong-nginx-controller under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Strong nginx controller versions are affected?
Affected versions include releases prior to current release patches across affected packages: strong-nginx-controller.
What version fixes CVE-2020-7621?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is strong-nginx-controller affected?
Yes, strong-nginx-controller 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-2020-7621?
CVE-2020-7621 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-2020-7621?
CVE-2020-7621 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2020-7621?
Run the dependency tree command: 'npm ls strong-nginx-controller'. 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-4v9w-pvwr-38h3",
  "modified" : "2026-07-06T15:49:57Z",
  "published" : "2022-02-10T23:36:54Z",
  "aliases" : [ "CVE-2020-7621" ],
  "summary" : "OS Command Injection in strong-nginx-controller",
  "details" : "strong-nginx-controller through 1.0.2 is vulnerable to Command Injection. It allows execution of arbitrary command as part of the '_nginxCmd()' function.",
  "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" : "strong-nginx-controller"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7621"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/strongloop/strong-nginx-controller/blob/master/lib/server.js#L65"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-STRONGNGINXCONTROLLER-564248"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-18T15:21:47Z",
    "nvd_published_at" : "2020-04-02T21:15:00Z"
  }
}