# CVE-2022-23520: ruby-rails-html-sanitizer: rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications

CVE-2022-23520 is fixed in ruby-rails-html-sanitizer on 1 platform, first by DEBIAN-CVE-2022-23520, released December 14, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-23520
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0119
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 14, 2022

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-rails-html-sanitizer Debian 12.15 (bookworm) | 1.4.4-1 | [DEBIAN-CVE-2022-23520](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23520.md) | Dec 14, 2022 |
| Linux | ruby-rails-html-sanitizer Debian 13.5 (trixie) | 1.4.4-1 | [DEBIAN-CVE-2022-23520](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23520.md) | Dec 14, 2022 |
| Linux | ruby-rails-html-sanitizer Debian 14 | 1.4.4-1 | [DEBIAN-CVE-2022-23520](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23520.md) | Dec 14, 2022 |

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