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CVE-2022-23515 — Vulnerability in loofah — CVE Details

MEDIUM

Improper neutralization of data URIs may allow XSS in Loofah

Published December 13, 2022Updated November 4, 2025Source: osv

Summary

## 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).

Advisory Timeline

  • First published December 13, 2022 (1399 days ago).
  • Last revised November 4, 2025 — 1057 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update loofah to 2.19.1 or later
gem install loofah -v 2.19.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
loofah
rubygems
2.1.0, 2.1.1, 2.10.0, 2.11.0 (+21 more)2.19.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-79
    Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.1 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Frequently Asked Questions

What is CVE-2022-23515?
Improper neutralization of data URIs may allow XSS in Loofah This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.1/10).
How do I check if my project is affected by CVE-2022-23515?
CVE-2022-23515 affects loofah. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2022-23515 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
6.1

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-228g-948r-83gx

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