Arbitrary Code Execution Vulnerability in Handlebars by Handlebars
CVE-2019-20920

8.1HIGH

Key Information:

Vendor: Handlebarsjs
Status: Handlebars
Vendor: CVE Published:; 30 September 2020

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What is CVE-2019-20920?

The Handlebars templating engine prior to versions 3.0.8 and 4.5.3 has a significant vulnerability where inadequate validation of templates in the lookup helper can lead to arbitrary code execution. This issue allows attackers to submit malicious templates, which can execute arbitrary JavaScript either on the server that processes the Handlebars templates or in the user's browser. Consequently, this poses a risk by enabling cross-site scripting (XSS) attacks, exposing user data and application integrity.