mcp-server-semgrep/semgrep-rules/csharp/razor/security/html-raw-json.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: html-raw-json
  patterns:
  - pattern-either:
    - pattern: '@Html.Raw(Json.Encode(...))'
    - pattern: '@Html.Raw(JsonConvert.SerializeObject(...))'
    - pattern: '@Html.Raw(...ToJson(...))'
  message: Unencoded JSON in HTML context is vulnerable to cross-site scripting, because `</script>` is
    not properly encoded.
  languages:
  - generic
  metadata:
    cwe:
    - "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
    category: security
    technology:
    - razor
    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: MEDIUM
    confidence: LOW
  paths:
    include:
    - '*.cshtml'
  severity: ERROR