mcp-server-semgrep

Version:

MCP Server for Semgrep Integration - static code analysis with AI

38 lines (37 loc) • 1.06 kB

YAML

rules:
- id: template-explicit-unescape
  message: >-
    Detected an explicit unescape in an EJS template, using
    '<%- ... %>' If external data can reach these locations,
    your application is exposed to a cross-site scripting (XSS)
    vulnerability. Use '<%= ... %>' to escape this data. If you
    need escaping, ensure no external data can reach this location.
  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:
    - http://www.managerjs.com/blog/2015/05/will-ejs-escape-save-me-from-xss-sorta/
    category: security
    technology:
    - express
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  languages:
  - regex
  severity: WARNING
  paths:
    include:
    - '*.ejs'
    - '*.html'
  pattern-regex: <%-((?!include).)*?%>
  fix-regex:
    regex: <%-(.*?)%>
    replacement: <%=\1%>