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Fencer Vulns
medium 6.1

CVE-2022-23520 json

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

published 2022-12-13 3 y ago modified 2026-06-17 4 mo ago also GHSA-rrfc-7g8p-99q8 , EUVD-2022-7739

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

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.

Patch / fix

  • rubygems rails-html-sanitizer 1.4.4
  • rubyonrails rails_html_sanitizers 1.4.4
  • ruby-rails-html-sanitizer Debian 14, Debian 13, Debian 12 1.4.4-1

debian advisories DEBIAN-CVE-2022-23520

  • cjson satellite capsule 6.13, satellite 6.13 1.7.14-5.el8sat
  • foreman satellite utils 6.13, satellite capsule 6.13, satellite 6.13 3.5.1.14-1.el8sat
  • katello satellite capsule 6.13, satellite 6.13 4.7.0-1.el8sat
  • libsolv satellite capsule 6.13, satellite 6.13 0.7.22-4.el8pc
  • libcomps satellite capsule 6.13, satellite 6.13 0.1.18-4.el8pc
  • qpid-cpp satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • qpid-qmf satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • candlepin satellite 6.13 4.2.13-1.el8sat

red hat advisories RHSA-2023:2097

  • rubygem-rails-html-sanitizer SLE High Availability Extension 15 SP5, SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3 +4 more 1.0.4-150000.4.6.1
  • rubygem-rails-html-sanitizer OpenStack Cloud Crowbar 9, OpenStack Cloud Crowbar 8 1.0.3-8.14.1

suse advisories SUSE-SU-2023:3714-1SUSE-SU-2023:3534-1

  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.9
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.7
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.5
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.5.0-1.1

opensuse advisories openSUSE-SU-2026:10361-1openSUSE-SU-2025:15125-1openSUSE-SU-2024:14175-1openSUSE-SU-2024:12769-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23520 updated cvss 6.1

rubygem-rails-html-sanitizer: Cross site scripting vulnerability with certain configurations

  • Red Hat 3scale API Management Platform 2 3scale-amp2/zync-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6 rubygem-rails-html-sanitizer, tfm-ror51-rubygem-rails-html-sanitizer, tfm-ror52-rubygem-rails-html-sanitizer
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Satellite 6.13 for RHEL 8 rubygem-rails-html-sanitizer 1.4.4-1.el8sat
    fixed: vendor fix RHSA-2023:2097
  • Red Hat Satellite 6.13 for RHEL 8 cjson 1.7.14-5.el8sat, katello 4.7.0-1.el8sat, libsolv 0.7.22-4.el8pc, libcomps 0.1.18-4.el8pc, python-idna 3.3-2.el8pc, python-pbr 5.8.0-4.el8pc, +670 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-rrfc-7g8p-99q8 referenced PoC, tagged "exploit" by a source, unverified
  • hackerone.com https://hackerone.com/reports/1654310 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
rubygems rails-html-sanitizer
<1.4.4
1.4.4

Affected products

  • rails rails-html-sanitizer

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.