Headline
GHSA-mcvf-2q2m-x72m: Improper neutralization of data URIs may allow XSS in rails-html-sanitizer
Summary
rails-html-sanitizer >= 1.0.3, < 1.4.4 is vulnerable to cross-site scripting via data URIs when used in combination with Loofah >= 2.1.0.
Mitigation
Upgrade to rails-html-sanitizer >= 1.4.4.
Severity
The maintainers have evaluated this as Medium Severity 6.1.
References
- CWE - CWE-79: Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’) (4.9)
- SVG MIME Type (image/svg+xml) is misleading to developers · Issue #266 · w3c/svgwg
- https://github.com/rails/rails-html-sanitizer/issues/135
- https://hackerone.com/reports/1694173
Credit
This vulnerability was independently reported by Maciej Piechota (@haqpl) and Mrinmoy Das (@goromlagche).
Improper neutralization of data URIs may allow XSS in rails-html-sanitizer
Moderate severity GitHub Reviewed Published Dec 13, 2022 in rails/rails-html-sanitizer • Updated Dec 13, 2022
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