Content Security Policy
Prevent XSS and data injection attacks with proper Content Security Policy configuration.
- Difficulty
- intermediate
- Read time
- 1 min read
- Version
- v1.0.0
- Confidence
- established
- Last updated
Quick Reference
CSP: Start with strict policy, relax as needed. Use nonces for inline scripts (not 'unsafe-inline'). Report violations with report-uri/report-to. Separate policies for different pages if needed. Test in report-only mode first. Always include default-src 'self'.
Use When
- Web applications
- XSS prevention
- Security hardening
- Compliance requirements
Skip When
- API-only services
- Internal tools (low risk)
- Static sites with no scripts
Content Security Policy
Prevent XSS and data injection attacks with proper Content Security Policy configuration.