mcp-server-semgrep/semgrep-rules/python/django/security/audit/xss/template-translate-as-no-escape.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: template-translate-as-no-escape
  languages: [generic]
  severity: INFO
  message: >-
    Translated strings will not be escaped when rendered in a template.
    This leads to a vulnerability where translators could include malicious script tags in their translations.
    Consider using `force_escape` to explicitly escape a translated text.
  patterns:
  - pattern-either:
    - pattern: |
        {% translate ... as $TRANS ... %}
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        {{ ... $TRANS ... }}
    - pattern: |
        {% trans ... as $TRANS ... %}
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        ...
        {{ ... $TRANS ... }}
  - pattern-not: |
      {% translate ... as $TRANS ... %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {{ ... $TRANS ... | ... force_escape ... }}
  - pattern-not: |
      {% trans ... as $TRANS ... %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {{ ... $TRANS ... | ... force_escape ... }}
  - pattern-not: |
      {% translate ... as $TRANS ... %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {% filter force_escape %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {{ ... $TRANS ... }}
  - pattern-not: |
      {% trans ... as $TRANS ... %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {% filter force_escape %}
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      ...
      {{ ... $TRANS ... }}
  metadata:
    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://edx.readthedocs.io/projects/edx-developer-guide/en/latest/preventing_xss/preventing_xss_in_django_templates.html#html-escaping-translations-in-django-templates
    - https://docs.djangoproject.com/en/3.1/topics/i18n/translation/#internationalization-in-template-code
    category: security
    technology:
    - django
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW