CVE-2018-3741

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.40%
Third-Party Advisory github.com
Affected: Rails rails-html-sanitizer
Published at:
Updated at:

References

Link Tags
https://github.com/rails/rails-html-sanitizer/commit/f3ba1a839a35f2ba7f941c15e239a1cb379d56ae patch third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2018-3741?
CVE-2018-3741 has been scored as a medium severity vulnerability.
How to fix CVE-2018-3741?
To fix CVE-2018-3741, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-3741 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-3741 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-3741?
CVE-2018-3741 affects Rails rails-html-sanitizer.
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