CVE-2018-3740

Description

A specially crafted HTML fragment can cause Sanitize gem for Ruby to allow non-whitelisted attributes to be used on a whitelisted HTML element.

Categories

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory debian.org
Affected: Ryan Grove sanitize (ruby gem)
Published at:
Updated at:

References

Link Tags
https://www.debian.org/security/2018/dsa-4358 vendor advisory
https://github.com/rgrove/sanitize/issues/176 third party advisory issue tracking
https://about.gitlab.com/2018/06/25/security-release-gitlab-11-dot-0-dot-1-released/
https://github.com/rgrove/sanitize/commit/01629a162e448a83d901456d0ba8b65f3b03d46e third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2018-3740?
CVE-2018-3740 has been scored as a high severity vulnerability.
How to fix CVE-2018-3740?
To fix CVE-2018-3740, 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-2018-3740 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-3740 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-2018-3740?
CVE-2018-3740 affects Ryan Grove sanitize (ruby gem).
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.