CVE-2022-23517

Name: CVE-2022-23517
Creator: NVD / NIST
Published: 2022-12-14T17:15:10.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2022-23517 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue has been patched in version 1.4.4.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.45%

70.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

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/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979Patch, Third Party Advisory
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8wThird Party Advisory
https://hackerone.com/reports/1684163Permissions Required, 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/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979Patch, Third Party Advisory
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8wThird Party Advisory
https://hackerone.com/reports/1684163Permissions Required, 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-2022-23517?

How severe is CVE-2022-23517?

CVE-2022-23517 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23517?

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-2022-23517?

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

Scan your code now

Source: NVD / NIST