CVE-2016-10547: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

November 6, 2018 (updated January 8, 2021)

Nunjucks is a full featured templating engine for JavaScript. Versions 2.4.2 and lower have a cross site scripting (XSS) vulnerability in autoescape mode. In autoescape mode, all template vars should automatically be escaped. By using an array for the keys, such as name[]=<script>alert(1)</script>, it is possible to bypass autoescaping and inject content into the DOM.

References

github.com/advisories/GHSA-f7ph-p5rv-phw2
github.com/matt-/nunjucks_test
github.com/mozilla/nunjucks/issues/835
nodesecurity.io/advisories/147
nvd.nist.gov/vuln/detail/CVE-2016-10547
www.npmjs.com/advisories/147

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