CVE-2021-39199 (High) detected in remark-html-7.0.0.tgz - autoclosed #321

Vulnerable Library - remark-html-7.0.0.tgz

Compile Markdown to HTML with remark

Library home page: https://registry.npmjs.org/remark-html/-/remark-html-7.0.0.tgz

Path to dependency file: node/tools/doc/package.json

Path to vulnerable library: node_modules/remark-html/package.json

Dependency Hierarchy:

• ❌ remark-html-7.0.0.tgz (Vulnerable Library)

Found in base branch: master

Vulnerability Details

remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: remark-html is now safe by default, and the implementation matches the documentation. On older affected versions, pass sanitize: true if you cannot update.

Publish Date: 2021-09-07

URL: CVE-2021-39199

CVSS 3 Score Details (10.0)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: None

Suggested Fix

Type: Upgrade version

Origin: GHSA-9q5w-79cv-947m

Release Date: 2021-09-07

Fix Resolution: remark-html - 13.0.2,14.0.1