Vulnerabilities in pkg:npm/markdown-it-katex

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Advisory Summary

GHSA-5ff8-jcf9-fw62 is a HIGH cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Markdown it katex libraries in the npm ecosystem. The issue involves cross-site scripting in markdown-it-katex. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/markdown-it-katex

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-5ff8-jcf9-fw62 - HIGH Cross-Site Scripting in markdown-it-katex

GHSA-5ff8-jcf9-fw62 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-5ff8-jcf9-fw62
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Markdown it katex
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-5ff8-jcf9-fw62

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

markdown-it-katex fixed: Latest secure release 
npm install markdown-it-katex@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 markdown-it-katex

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-5ff8-jcf9-fw62, inspect your project dependencies using npm:

npm ls markdown-it-katex

Analyze the terminal output to locate any version of Markdown it katex 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 markdown-it-katex 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 Markdown it katex, 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 `markdown-it-katex` are vulnerable to Cross-Site Scripting (XSS). The package fails to properly escape error messages, which may allow attackers to execute arbitrary JavaScript in a victim's browser by triggering an error. ## Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.

GHSA-5ff8-jcf9-fw62 Affected Markdown it katex Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
markdown-it-katex
npm/markdown-it-katex
npm
≥ 0.0.0

References

Markdown it katex Source Repository REPOSITORY
https://github.com/waylonflinn/markdown-it-katex/issues/26
Markdown it katex Source Repository REPOSITORY
https://github.com/waylonflinn/markdown-it-katex
www.npmjs.com/advisories/1466 WEB
https://www.npmjs.com/advisories/1466

Frequently Asked Questions

What is GHSA-5ff8-jcf9-fw62?
GHSA-5ff8-jcf9-fw62 is a security vulnerability in Markdown it katex involving Cross-Site Scripting in markdown-it-katex under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Markdown it katex versions are affected?
Affected versions include releases prior to current release patches across affected packages: markdown-it-katex.
What version fixes GHSA-5ff8-jcf9-fw62?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is markdown-it-katex affected?
Yes, markdown-it-katex is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-5ff8-jcf9-fw62?
GHSA-5ff8-jcf9-fw62 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 GHSA-5ff8-jcf9-fw62?
Run the dependency tree command: 'npm ls markdown-it-katex'. 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-5ff8-jcf9-fw62",
  "modified" : "2021-10-04T20:53:26Z",
  "published" : "2020-09-04T17:55:35Z",
  "aliases" : [ ],
  "summary" : "Cross-Site Scripting in markdown-it-katex",
  "details" : "All versions of `markdown-it-katex` are vulnerable to Cross-Site Scripting (XSS). The package fails to properly escape error messages, which may allow attackers to execute arbitrary JavaScript in a victim's browser by triggering an error.\n\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative package until a fix is made available.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "markdown-it-katex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/waylonflinn/markdown-it-katex/issues/26"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/waylonflinn/markdown-it-katex"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1466"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T19:00:19Z",
    "nvd_published_at" : null
  }
}