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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWY3cGgtcDVydi1waHcy
Cross-Site Scripting in nunjucks
Affected versions of nunjucks do not properly escape specially structured user input in template vars when in auto-escape mode, resulting in a cross-site scripting vulnerability.
Proof of Concept
By using an array for the keys in a template var, escaping is bypassed.
name[]=<script>alert(1)</script>
A full PoC is available in the references section.
Recommendation
Update to version 2.4.3 or later.
Permalink: https://github.com/advisories/GHSA-f7ph-p5rv-phw2JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWY3cGgtcDVydi1waHcy
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 6 years ago
Updated: almost 2 years ago
Identifiers: GHSA-f7ph-p5rv-phw2, CVE-2016-10547
References:
- https://nvd.nist.gov/vuln/detail/CVE-2016-10547
- https://github.com/mozilla/nunjucks/issues/835
- https://github.com/advisories/GHSA-f7ph-p5rv-phw2
- https://github.com/matt-/nunjucks_test
- https://www.npmjs.com/advisories/147
Blast Radius: 0.0
Affected Packages
npm:nunjucks
Dependent packages: 2,944Dependent repositories: 68,715
Downloads: 4,296,793 last month
Affected Version Ranges: < 2.4.3
Fixed in: 2.4.3
All affected versions: 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.1.8, 0.1.9, 0.1.10, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.1.0, 1.2.0, 1.3.0, 1.3.1, 1.3.3, 1.3.4, 2.0.0, 2.1.0, 2.2.0, 2.3.0, 2.4.0, 2.4.1, 2.4.2
All unaffected versions: 2.4.3, 2.5.0, 2.5.1, 2.5.2, 3.0.0, 3.0.1, 3.1.0, 3.1.2, 3.1.3, 3.1.4, 3.1.6, 3.1.7, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4