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HIGH8.1

GHSA-3cqr-58rm-57f8

Arbitrary Code Execution in Handlebars

Quick fix

GHSA-3cqr-58rm-57f8 — handlebars: upgrade to the fixed version with the command below.

npm install handlebars@3.0.8

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).

Are you affected?

Enter the version of the package you're using.

Affected packages

npm/handlebars
Introduced in: 0Fixed in: 3.0.8
Fixnpm install handlebars@3.0.8
npm/handlebars
Introduced in: 4.0.0Fixed in: 4.5.3
Fixnpm install handlebars@4.5.3

References