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).
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Affected Vendors & Products
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History
Fri, 09 Oct 2026 09:30:00 +0000
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Status: PUBLISHED
Assigner: mitre
Published: 2020-09-30T12:30:56.000Z
Updated: 2026-10-08T21:13:55.415Z
Reserved: 2020-09-30T00:00:00.000Z
Link: CVE-2019-20920
Updated: 2024-08-05T03:00:18.770Z
Status : Modified
Published: 2020-09-30T18:15:17.927
Modified: 2026-10-08T22:16:54.603
Link: CVE-2019-20920