mcp-server-semgrep/semgrep-rules/javascript/xml2json/security/audit/xml2json-xxe.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: xml2json-xxe
  message: >-
    If unverified user data can reach the XML Parser it can result in XML External or
    Internal Entity (XXE) Processing vulnerabilities
  metadata:
    owasp:
    - A04:2017 - XML External Entities (XXE)
    - A05:2021 - Security Misconfiguration
    cwe:
    - 'CWE-611: Improper Restriction of XML External Entity Reference'
    asvs:
      section: V5 Validation, Sanitization and Encoding
      control_id: 5.5.2 Insecue XML Deserialization
      control_url: https://github.com/OWASP/ASVS/blob/master/4.0/en/0x13-V5-Validation-Sanitization-Encoding.md#v55-deserialization-prevention
      version: '4'
    category: security
    technology:
    - xml2json
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
    references:
    - https://owasp.org/Top10/A05_2021-Security_Misconfiguration
  languages:
  - javascript
  - typescript
  severity: WARNING
  patterns:
  - pattern: |
      var $XML = require('xml2json');
      ...
      $XML.toJson(...);
  - pattern-not: |
      var $XML = require('xml2json');
      ...
      $XML.toJson("...",...);
  - pattern-not: |-
      var $XML = require('xml2json');
      ...
      var $S = "...";
      ...
      $XML.toJson($S,...);