CVE-2022-23520

Public Exploit
rails-html-sanitizer contains an incomplete fix for an XSS vulnerability

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Prior to version 1.4.4, there is a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer due to an incomplete fix of CVE-2022-32209. Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer's allowed tags to allow both "select" and "style" elements. Code is only impacted if allowed tags are being overridden. This issue is patched in version 1.4.4. All users overriding the allowed tags to include both "select" and "style" should either upgrade or use this workaround: Remove either "select" or "style" from the overridden allowed tags. NOTE: Code is _not_ impacted if allowed tags are overridden using either the :tags option to the Action View helper method sanitize or the :tags option to the instance method SafeListSanitizer#sanitize.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.34%
Third-Party Advisory github.com Third-Party Advisory hackerone.com Third-Party Advisory debian.org
Affected: rails rails-html-sanitizer
Published at:
Updated at:

References

Link Tags
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-rrfc-7g8p-99q8 third party advisory exploit
https://hackerone.com/reports/1654310 third party advisory exploit
https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2022-23520?
CVE-2022-23520 has been scored as a medium severity vulnerability.
How to fix CVE-2022-23520?
To fix CVE-2022-23520, 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-2022-23520 being actively exploited in the wild?
It is possible that CVE-2022-23520 is being exploited or will be exploited in a near future based on public information. 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-2022-23520?
CVE-2022-23520 affects rails rails-html-sanitizer.
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