Cross-Site Scripting in mustache
Versions of mustache prior to 2.2.1 are affected by a cross-site scripting vulnerability when attributes in mustache templates are not quoted.
Example
Template:
<a href={{foo}}/>
Input:
{ 'foo' : 'test.com onload=alert(1)'}
Rendered result:
<a href=test.com onload=alert(1)/>
Recommendation
Update to version 2.2.1 or later. Alternatively, ensure that all attributes in hmustache templates are encapsulated with quotes.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | mustache | < 2.2.1 | 2.2.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2015-8862
- https://github.com/janl/mustache.js/commit/378bcca8a5cfe4058f294a3dbb78e8755e8e0da5
- https://github.com/advisories/GHSA-w3w8-37jv-2c58
- https://github.com/janl/mustache.js
- https://www.npmjs.com/advisories/62
- https://www.tenable.com/security/tns-2016-18
- http://www.openwall.com/lists/oss-security/2016/04/20/11
- http://www.securityfocus.com/bid/96436
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
mustache- Disclosed
- 24.10.2017
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-w3w8-37jv-2c58 - CC BY 4.0
Vulnerability history: mustache
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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