CVE-2018-3741

MEDIUM

rails-html-sanitizer Cross-site Scripting vulnerability

Published April 26, 2018Updated November 8, 2023Source: osv

Summary

There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted attributes to be present in sanitized output when input with specially-crafted HTML fragments, and these attributes can lead to an XSS attack on target applications. This issue is similar to CVE-2018-8048 in Loofah. All users running an affected release should either upgrade or use one of the workarounds immediately.

Remediation

Upgrade to the fixed version using your package manager.

Bundler

Update rails-html-sanitizer to 1.0.4 or later

gem install rails-html-sanitizer -v 1.0.4

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

Affected Packages (1)

Package	Ecosystem	Affected	Fixed In
rails-html-sanitizer	rubygems	1.0.0, 1.0.1, 1.0.2, 1.0.3	1.0.4

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-2018-3741?: rails-html-sanitizer Cross-site Scripting vulnerability 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-2018-3741?: CVE-2018-3741 affects rails-html-sanitizer. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-3741 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-px3r-jm9g-c8w8

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