Unsanitized user input detected in raw HTML string.
- Rule ID: ruby_lang_raw_html_using_user_input
- Languages: ruby
- Source: raw_html_using_user_input.yml
Description
Applications should not include unsanitized user input in HTML. This can allow cross-site scripting (XSS) attacks.
Remediations
❌ Avoid including user input directly in HTML strings:
html = "<h1>#{params[:title]}</h1>"
✅ Use a templating language such as ERB, and place the template in a separate file.
✅ When HTML strings must be used, sanitize user input:
html = "<h1>#{strip_tags(params[:title])}</h1>"
Resources
Associated CWE
OWASP Top 10
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