mcp-server-semgrep/semgrep-rules/ruby/rails/security/audit/xss/manual-template-creation.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: manual-template-creation
  metadata:
    source-rule-url: https://github.com/presidentbeef/brakeman/blob/main/lib/brakeman/checks/check_template_injection.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
    category: security
    technology:
    - rails
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  message: >-
    Detected manual creation of an ERB template. Manual creation of templates
    may expose your application to server-side template injection (SSTI) or
    cross-site scripting (XSS) attacks if user input is used to create the
    template. Instead, create a '.erb' template file and use 'render'.
  languages: [ruby]
  severity: WARNING
  pattern: ERB.new(...)