Vulnerabilities in pkg:npm/anchorme

PACKAGE
Advisory Identifier: GHSA-w4wq-rvmq-77x7
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Advisory Summary

CVE-2021-23411 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Anchorme libraries in the npm ecosystem. The issue involves cross-site scripting in anchorme. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/anchorme

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-w4wq-rvmq-77x7 CVE-2021-23411 MODERATE Cross-site scripting in anchorme

CVE-2021-23411 at a Glance

CVE Identifier CVE-2021-23411
GHSA Identifier GHSA-w4wq-rvmq-77x7
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Anchorme
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.4

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

How to Fix CVE-2021-23411

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

anchorme fixed: Latest secure release 
npm install anchorme@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 anchorme

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-23411, inspect your project dependencies using npm:

npm ls anchorme

Analyze the terminal output to locate any version of Anchorme 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 anchorme 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-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 Anchorme, 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

All versions of package anchorme are vulnerable to Cross-site Scripting (XSS) via the main functionality.

CVE-2021-23411 Affected Anchorme Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
anchorme
npm/anchorme
npm
≤ 2.1.2

References

NVD — CVE-2021-23411 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23411
Anchorme Source Repository REPOSITORY
https://github.com/alexcorvi/anchorme.js/blob/gh-pages/src/transform.ts#23L81
Anchorme Source Repository REPOSITORY
https://github.com/alexcorvi/anchorme.js/blob/gh-pages/src/transform.ts%23L81
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1320695
snyk.io/vuln/snyk-js-anchor... WEB
https://snyk.io/vuln/SNYK-JS-ANCHORME-1311008

Frequently Asked Questions

What is CVE-2021-23411?
CVE-2021-23411 is a security vulnerability in Anchorme involving Cross-site scripting in anchorme under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Anchorme versions are affected?
Affected versions include releases prior to current release patches across affected packages: anchorme.
What version fixes CVE-2021-23411?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is anchorme affected?
Yes, anchorme 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-2021-23411?
CVE-2021-23411 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2021-23411?
CVE-2021-23411 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 npm dependencies for CVE-2021-23411?
Run the dependency tree command: 'npm ls anchorme'. 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-w4wq-rvmq-77x7",
  "modified" : "2021-07-26T17:36:48Z",
  "published" : "2021-07-26T21:23:58Z",
  "aliases" : [ "CVE-2021-23411" ],
  "summary" : "Cross-site scripting in anchorme",
  "details" : "All versions of package anchorme are vulnerable to Cross-site Scripting (XSS) via the main functionality.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "anchorme"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23411"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alexcorvi/anchorme.js/blob/gh-pages/src/transform.ts#23L81"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alexcorvi/anchorme.js/blob/gh-pages/src/transform.ts%23L81"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1320695"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-ANCHORME-1311008"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-26T17:36:48Z",
    "nvd_published_at" : "2021-07-21T15:15:00Z"
  }
}