mcp-server-semgrep/semgrep-rules/javascript/express/security/audit/possible-user-input-redirect.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: unknown-value-in-redirect
  message: >-
    It looks like '$UNK' is read from user input and it is used to as a redirect. Ensure
    '$UNK' is not externally controlled, otherwise this is an open redirect.
  metadata:
    owasp:
    - A01:2021 - Broken Access Control
    cwe:
    - "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')"
    asvs:
      section: V5 Validation, Sanitization and Encoding
      control_id: 5.5.1 Insecue Redirect
      control_url: https://github.com/OWASP/ASVS/blob/master/4.0/en/0x13-V5-Validation-Sanitization-Encoding.md#v51-input-validation
      version: '4'
    category: security
    technology:
    - express
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
    references:
    - https://owasp.org/Top10/A01_2021-Broken_Access_Control
  languages:
  - javascript
  - typescript
  severity: WARNING
  patterns:
  - pattern-either:
    - pattern-inside: |
        $UNK = query.$B;
        ...
    - pattern-inside: |
        $UNK = $A.query.$B;
        ...
    - pattern-inside: |
        $UNK = req.$SOMETHING;
        ...
  - pattern: $RES.redirect(..., <... $UNK ...>, ...)