Headline
GHSA-228g-948r-83gx: Improper neutralization of data URIs may allow XSS in Loofah
Summary
Loofah >= 2.1.0, < 2.19.1 is vulnerable to cross-site scripting via the image/svg+xml media type in data URIs.
Mitigation
Upgrade to Loofah >= 2.19.1.
Severity
The Loofah 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://hackerone.com/reports/1694173
- https://github.com/flavorjones/loofah/issues/101
Credit
This vulnerability was responsibly reported by Maciej Piechota (@haqpl).
Improper neutralization of data URIs may allow XSS in Loofah
Moderate severity GitHub Reviewed Published Dec 13, 2022 in flavorjones/loofah • Updated Dec 13, 2022
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Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.1.0, < 2.19.1 is vulnerable to cross-site scripting via the image/svg+xml media type in data URIs. This issue is patched in version 2.19.1.