mcp-server-semgrep/semgrep-rules/typescript/nestjs/security/audit/nestjs-header-xss-disabled.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: nestjs-header-xss-disabled
  message: >-
    X-XSS-Protection header is set to 0. This will disable the browser's XSS Filter.
  metadata:
    cwe:
    - "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
    category: security
    technology:
    - nestjs
    owasp:
    - A07:2017 - Cross-Site Scripting (XSS)
    - A03:2021 - Injection
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
  languages:
  - typescript
  severity: WARNING
  pattern: |
    class $CN {
        ...
        @Header("=~/[Xx]-[Xx][Ss][Ss]-[Pp][Rr][Oo][Tt][Ee][Cc][Tt][Ii][Oo][Nn]/", '0')
        $FN(...) {
            ...
        }
        ...
    }