Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTlwcmgtMjU3dy05Mjc3

Cross-Site Scripting in handlebars

Versions of handlebars prior to 4.0.0 are affected by a cross-site scripting vulnerability when attributes in handlebar templates are not quoted.

Proof of Concept

Template:
<a href={{foo}}/>

Input:
{ 'foo' : 'test.com onload=alert(1)'}

Rendered result:
<a href=test.com onload=alert(1)/>

Recommendation

Update to version 4.0.0 or later.
Alternatively, ensure that all attributes in handlebars templates are encapsulated with quotes.

Permalink: https://github.com/advisories/GHSA-9prh-257w-9277
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTlwcmgtMjU3dy05Mjc3
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 6 years ago
Updated: almost 2 years ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Percentage: 0.00153
EPSS Percentile: 0.52029

Identifiers: GHSA-9prh-257w-9277, CVE-2015-8861
References:

• https://nvd.nist.gov/vuln/detail/CVE-2015-8861
• https://github.com/wycats/handlebars.js/pull/1083
• https://blog.srcclr.com/handlebars_vulnerability_research_findings/
• https://github.com/advisories/GHSA-9prh-257w-9277
• https://www.npmjs.com/advisories/61
• https://www.sourceclear.com/blog/handlebars_vulnerability_research_findings/
• https://www.tenable.com/security/tns-2016-18
• http://www.openwall.com/lists/oss-security/2016/04/20/11
• http://www.securityfocus.com/bid/96434

Repository: https://github.com/wycats/handlebars.js
Blast Radius: 37.2

Affected Packages