Is CVE-2019-20920 actively exploited?

CVE-2019-20920 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2019-20920?

CVE-2019-20920 has a CVSS score of 8.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L.

How do I patch CVE-2019-20920?

Patch guidance is available from handlebarsjs security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2019-20920.

Fix CVE-2019-20920 - HIGH handlebarsjs handlebars

Q: Which products are affected by CVE-2019-20920?

2 products: handlebarsjs handlebars, handlebarsjs handlebars.

Description

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).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: changed
Confidentiality: high
Integrity: low
Availability: low
Weaknesses: CWE-94 · Code Injection

Metadata

Primary Vendor: HANDLEBARSJS
Published: 9/30/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

handlebarsjs : handlebarshandlebarsjs : handlebars

Remediation Guidance

Executive Summary

Cite this page

CVE-2019-20920. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2019-20920

View on NIST NVD

CVE-2019-20920 vulnerability