CVE-2018-3741: XSS
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2018-3741.
What is the severity of CVE-2018-3741?
The severity of CVE-2018-3741 is medium with a CVSS score of 6.1.
What is the affected software?
The affected software is all versions of the rails-html-sanitizer gem below 1.0.4 for Ruby.
What is the impact of the vulnerability?
The vulnerability allows non-whitelisted attributes to be present in sanitized output, which can lead to an XSS attack on target applications.
How do I fix CVE-2018-3741?
To fix CVE-2018-3741, you should update the rails-html-sanitizer gem to version 1.0.4 or higher.