CVE-2022-23519

Name: CVE-2022-23519
Creator: NVD / NIST
Published: 2022-12-14T17:15:11.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2022-23519 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Prior to version 1.4.4, a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer's allowed tags in either of the following ways: allow both "math" and "style" elements, or allow both "svg" and "style" elements. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Prior to version 1.4.4, a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer's allowed tags in either of the following ways: allow both "math" and "style" elements, or allow both "svg" and "style" elements. Code is only impacted if allowed tags are being overridden. . This issue is fixed in version 1.4.4. All users overriding the allowed tags to include "math" or "svg" and "style" should either upgrade or use the following workaround immediately: Remove "style" from the overridden allowed tags, or remove "math" and "svg" from the overridden allowed tags.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.99%

58.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rubyonrails	Rails Html Sanitizers	< 1.4.4
Debian	Debian Linux	10.0

References

https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-9h9g-93gc-623hExploit, Third Party Advisory
https://hackerone.com/reports/1656627Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00012.htmlMailing List, Third Party Advisory
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-9h9g-93gc-623hExploit, Third Party Advisory
https://hackerone.com/reports/1656627Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00012.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/09/msg00045.html

Timeline

Published: Dec 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-23519?

How severe is CVE-2022-23519?

CVE-2022-23519 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23519?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-23519?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST