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

[mend-for-github-com[bot]]

CVE-2019-20920 - High Severity Vulnerability

Vulnerable Library - handlebars-4.1.2.min.js

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

Library home page: https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.1.2/handlebars.min.js

Path to dependency file: /examples/forms_wizard/forms/userWarning/index.html

Path to vulnerable library: /examples/forms_wizard/forms/userWarning/index.html,/examples/forms_wizard/forms/userData/index.html,/examples/dynamic_form_values/forms/myForm/index.html,/examples/form_l10n/forms/myOtherForm/index.html,/examples/custom_form/forms/myForm/index.html

Dependency Hierarchy: - :x: **handlebars-4.1.2.min.js** (Vulnerable Library)

Found in HEAD commit: a0a888b3b97fbcfb092cc1f80f98558cfea2d71f

Found in base branch: master

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