| Package | Affected versions | Patched versions |
|---|---|---|
| handlebars.js | < 4.0.0 | 4.0.0 |
| handlebars | < 4.0.0 | 4.0.0 |
Versions of handlebars prior to 4.0.0 are affected by a cross-site scripting vulnerability when attributes in handlebar templates are not quoted.
Template:
<a href={{foo}}/>
Input:
{ 'foo' : 'test.com onload=alert(1)'}
Rendered result:
<a href=test.com onload=alert(1)/>
Update to version 4.0.0 or later. Alternatively, ensure that all attributes in handlebars templates are encapsulated with quotes.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free