avoid-content-tag.yaml

rules:
- id: avoid-content-tag
  metadata:
    source-rule-url: https://github.com/presidentbeef/brakeman/blob/main/lib/brakeman/checks/check_content_tag.rb
    owasp:
    - A07:2017 - Cross-Site Scripting (XSS)
    - A03:2021 - Injection
    cwe:
    - "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
    references:
    - https://github.com/presidentbeef/brakeman/blob/main/docs/warning_types/template_injection/index.markdown
    - https://www.netsparker.com/blog/web-security/preventing-xss-ruby-on-rails-web-applications/
    category: security
    technology:
    - rails
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  message: >-
    'content_tag()' bypasses HTML escaping for some portion of the content.
    If external data can reach here, this exposes your application
    to cross-site scripting (XSS) attacks. Ensure no external data reaches here.
    If you must do this, create your HTML manually and use 'html_safe'. Ensure no
    external data enters the HTML-safe string!
  languages: [ruby]
  severity: WARNING
  pattern: content_tag(...)