CVE-2018-3741

MEDIUM

rails-html-sanitizer < 1.0.4 - Cross-Site Scripting via Non-Whitelisted Attribute Bypass

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0013
EPSS Percentile 31.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (2)
rubygems/rails-html-sanitizer 0 - 1.0.4RubyGems
rubyonrails/html_sanitizer < 1.0.3
Published Mar 30, 2018
Tracked Since Feb 18, 2026