CVE-2022-23520
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 1.4.4-1 |
| debian | bullseye | fixed | 1.3.0-1+deb11u1 |
| debian | forky | fixed | 1.4.4-1 |
| debian | sid | fixed | 1.4.4-1 |
| debian | trixie | fixed | 1.4.4-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | rails-html-sanitizer | <>= 1.4.4 | >= 1.4.4 |
| RubyGems | rails-html-sanitizer | <1.4.4 | 1.4.4 |
References
- https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-rrfc-7g8p-99q8
- https://errata.rockylinux.org/RLSA-2023:2097
- https://www.suse.com/security/cve/CVE-2022-23520.html
- https://nvd.nist.gov/vuln/detail/CVE-2022-23520
- https://hackerone.com/reports/1654310
- https://github.com/rails/rails-html-sanitizer
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2022-23520.yml
- https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html
- https://lists.debian.org/debian-lts-announce/2024/09/msg00045.html
- https://security-tracker.debian.org/tracker/CVE-2022-23520
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.