CVE-2022-23515 — Improper neutralization of data URIs may allow XSS in Loofah

Affected: flavorjones loofah

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.

GHSA-228g-948r-83gx — Improper neutralization of data URIs may allow XSS in Loofah

Affected: RubyGems: 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](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

## References

- [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html) - [SVG MIME Type (image/svg+xml) is misleading to developers · Issue #266 · w3c/svgwg](https://github.com/w3c/svgwg/issues/266) - https://hackerone.com/reports/1694173 - https://github.com/flavorjones/loofah/issues/101

## Credit

This vulnerability was responsibly reported by Maciej Piechota (@haqpl).

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CVE-2022-23515 — Improper neutralization of data URIs may allow XSS in Loofah

GHSA-228g-948r-83gx — Improper neutralization of data URIs may allow XSS in Loofah