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feat(html): detect HTML documents without a Content-Security-Policy meta tag (CWE-693) #133

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feat(html): detect HTML documents without a Content-Security-Policy meta tag (CWE-693) #133

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25 changes: 25 additions & 0 deletions html/securitypolicy/missing_csp_meta.yaml
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Original file line number Diff line number Diff line change
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rules:
- id: codevigilant.html.securitypolicy.missing-csp-meta
patterns:
- pattern: <html>...</html>
- pattern-not-regex: (?i)<meta[^>]*http-equiv=["']?\s*Content-Security-Policy
message: |
Detected an HTML document without a Content-Security-Policy.
Pages served without a CSP meta tag (or header) rely on browser
defaults, so any injected or third-party script executes with full
privileges. Add a Content-Security-Policy meta tag restricting
default-src, script-src and object-src.
metadata:
category: security
cwe: "CWE-693: Protection Mechanism Failure"
owasp: "A05:2021 - Security Misconfiguration"
technology: html
confidence: MEDIUM
references:
- https://owasp.org/www-community/controls/Content_Security_Policy
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
source: https://github.com/CodeVigilant/codevigilant_semgrep_rules
license: MIT
languages: [html]
mode: search
severity: LOW