npm

Severity: high

Cross-Site Scripting

mustache

Overview

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)/>

Remediation

Update to version 2.2.1 or later. Alternatively, ensure that all attributes in hmustache templates are encapsulated with quotes.

Resources

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Advisory timeline

  1. published

    Advisory published
    Dec 14th, 2015
  2. reported

    Initial report by Matias P. Brutti
    Dec 14th, 2015