CVE-2019-20920 (High) detected in handlebars-4.1.2.tgz

[mend-bolt-for-github]

CVE-2019-20920 - High Severity Vulnerability

Vulnerable Library - handlebars-4.1.2.tgz

Handlebars provides the power necessary to let you build semantic templates effectively with no frustration

Library home page: https://registry.npmjs.org/handlebars/-/handlebars-4.1.2.tgz

Path to dependency file: /event-system/package.json

Path to vulnerable library: /node_modules/handlebars/package.json

Dependency Hierarchy:

• nyc-14.1.1.tgz (Root Library)
  • istanbul-reports-2.2.4.tgz
    • ❌ handlebars-4.1.2.tgz (Vulnerable Library)

Vulnerability Details

Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).

Publish Date: 2020-09-30

URL: CVE-2019-20920

CVSS 3 Score Details (8.1)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.npmjs.com/advisories/1316

Release Date: 2020-10-15

Fix Resolution (handlebars): 4.5.3

Direct dependency fix Resolution (nyc): 15.0.0

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