6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
39.5%
There is a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer.
A possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer’s allowed tags in either of the following ways:
Code is only impacted if allowed tags are being overridden. Applications may be doing this in four different ways:
# In config/application.rb
config.action_view.sanitized_allowed_tags = ["math", "style"]
# or
config.action_view.sanitized_allowed_tags = ["svg", "style"]
see https://guides.rubyonrails.org/configuring.html#configuring-action-view
:tags
option to the Action View helper sanitize
:<%= sanitize @comment.body, tags: ["math", "style"] %>
<%# or %>
<%= sanitize @comment.body, tags: ["svg", "style"] %>
see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize
allowed_tags=
:# class-level option
Rails::Html::SafeListSanitizer.allowed_tags = ["math", "style"]
# or
Rails::Html::SafeListSanitizer.allowed_tags = ["svg", "style"]
:tags
options to the Rails::Html::SafeListSanitizer instance method sanitize
:# instance-level option
Rails::Html::SafeListSanitizer.new.sanitize(@article.body, tags: ["math", "style"])
# or
Rails::Html::SafeListSanitizer.new.sanitize(@article.body, tags: ["svg", "style"])
All users overriding the allowed tags by any of the above mechanisms to include ((“math” or “svg”) and “style”) should either upgrade or use one of the workarounds immediately.
Remove “style” from the overridden allowed tags, or remove “math” and “svg” from the overridden allowed tags.
This vulnerability was responsibly reported by Dominic Breuker.
CPE | Name | Operator | Version |
---|---|---|---|
rails-html-sanitizer | lt | 1.4.4 |
github.com/advisories/GHSA-9h9g-93gc-623h
github.com/rails/rails-html-sanitizer/security/advisories/GHSA-9h9g-93gc-623h
github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2022-23519.yml
hackerone.com/reports/1656627
lists.debian.org/debian-lts-announce/2023/09/msg00012.html
nvd.nist.gov/vuln/detail/CVE-2022-23519
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
39.5%