CVE-2019-20920

PoC —

CVSS 3.1

8.1 high

EPSS

3%p87

Published

Sep 30, 2020 (Sep 30, 2020)

Modified

Jun 17, 2026

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).

Vendors: handlebarsjs
Products: handlebars
Weakness: CWE-94
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L

NVD CVE.org GitHub PoCs EPSS (3.2%)

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