CVE-2019-20920: Improper Control of Generation of Code ('Code Injection')

February 10, 2022

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).

References

github.com/advisories/GHSA-3cqr-58rm-57f8
github.com/handlebars-lang/handlebars.js/commit/d54137810a49939fd2ad01a91a34e182ece4528e
nvd.nist.gov/vuln/detail/CVE-2019-20920
snyk.io/vuln/SNYK-JS-HANDLEBARS-534478
www.npmjs.com/advisories/1316
www.npmjs.com/advisories/1324
www.npmjs.com/package/handlebars

Detect and mitigate CVE-2019-20920 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →