mcp-server-semgrep/semgrep-rules/python/django/security/audit/avoid-mark-safe.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: avoid-mark-safe
  patterns:
  - pattern-not-inside: django.utils.html.format_html(...)
  - pattern-not: django.utils.safestring.mark_safe("...")
  - pattern: django.utils.safestring.mark_safe(...)
  message: >-
    'mark_safe()' is used to mark a string as "safe" for HTML output.
    This disables escaping and could therefore subject the content to
    XSS attacks. Use 'django.utils.html.format_html()' to build HTML
    for rendering instead.
  metadata:
    source-rule-url: https://bandit.readthedocs.io/en/latest/plugins/b703_django_mark_safe.html
    cwe:
    - "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
    owasp:
    - A07:2017 - Cross-Site Scripting (XSS)
    - A03:2021 - Injection
    references:
    - https://docs.djangoproject.com/en/3.0/ref/utils/#django.utils.safestring.mark_safe
    - https://docs.djangoproject.com/en/3.0/ref/utils/#django.utils.html.format_html
    category: security
    technology:
    - django
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  languages: [python]
  severity: WARNING