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Security Advisories: GSA_kwCzR0hTQS1wZzh2LWc0eHEtaHd3Oc4AAs-c

Rails::Html::Sanitizer vulnerable to Cross-site Scripting

Versions of Rails::Html::Sanitizer prior to version 1.4.3 are vulnerable to XSS with certain configurations of Rails::Html::Sanitizer which allows an attacker to inject content when 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 may be done via application configuration: ruby# In config/application.rbconfig.action_view.sanitized_allowed_tags = ["select", "style"]

see https://guides.rubyonrails.org/configuring.html#configuring-action-view

Or it may be done with a :tags option to the Action View helper sanitize: <%= sanitize @comment.body, tags: ["select", "style"] %>

see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize

It may also be done with Rails::Html::SafeListSanitizer directly:
ruby# class-level optionRails::Html::SafeListSanitizer.allowed_tags = ["select", "style"] or with
ruby# instance-level optionRails::Html::SafeListSanitizer.new.sanitize(@article.body, tags: ["select", "style"])

All users overriding the allowed tags by any of the above mechanisms to include both "select" and "style" are recommended to upgrade immediately. A workaround for this issue can be applied by removing either select or style from the overridden allowed tags.

Permalink: https://github.com/advisories/GHSA-pg8v-g4xq-hww9
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1wZzh2LWc0eHEtaHd3Oc4AAs-c
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: almost 2 years ago
Updated: about 2 months ago


CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-pg8v-g4xq-hww9, CVE-2022-32209
References: Repository: https://github.com/rails/rails-html-sanitizer

Affected Packages

rubygems:rails-html-sanitizer
Dependent packages: 30
Dependent repositories: 517,903
Downloads: 428,586,794 total
Affected Version Ranges: < 1.4.3
Fixed in: 1.4.3
All affected versions: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.4.1, 1.4.2
All unaffected versions: 1.4.3, 1.4.4, 1.5.0, 1.6.0