Unsanitized user input in raw HTML strings (XSS)

• Rule ID: ruby_rails_render_using_user_input
• Languages: ruby
• Source: render_using_user_input.yml

Description

Including unsanitized user input in HTML responses can lead to cross-site scripting (XSS) attacks. This vulnerability exposes your application to malicious scripts injected by attackers, compromising user data and browser security.

Remediations

• Do not include unsanitized user input directly in HTML responses. This practice makes your application vulnerable to XSS attacks.

  render html: "<h1>#{params[:title]}</h1>"

• Do sanitize user input before including it in an HTML response to prevent XSS attacks.

  render html: "<h1>#{strip_tags(params[:title])}</h1>"

References

• OWASP Cross-Site Scripting (XSS) Cheatsheet

Associated CWE

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

OWASP Top 10

• A03:2021 - Injection

Configuration

To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=ruby_rails_render_using_user_input

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=ruby_rails_render_using_user_input