CVE-2019-20920
High
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).
SeverityHigh
CVSS8.1
Exploit probability—
Product
Handlebars
PublishedSep 30, 2020
First seenSep 30, 2020
How to fix
Update
- handlebarsjs handlebars3.0.8, 4.5.3 or later
- handlebars3.0.8, 4.5.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| handlebarsjs handlebars | v < 3.0.8, 4.0.0 ≤ v < 4.5.3 | 3.0.8, 4.5.3 |
| handlebarsnpm | v < 3.0.8, 4.0.0 ≤ v < 4.5.3 | 3.0.8, 4.5.3 |
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