We actively support the following versions of Secure Pastebin with security updates:

We take security seriously. If you discover a security vulnerability, please follow these steps:

DO NOT create a public GitHub issue for security vulnerabilities.

Instead, please email us directly at:

• Email: security@your-domain.com (replace with your actual email)
• Subject: [SECURITY] Brief description of the vulnerability

Please include the following information in your report:

1. Vulnerability Description: Clear description of the security issue
2. Impact Assessment: What could an attacker achieve?
3. Reproduction Steps: Step-by-step instructions to reproduce the issue
4. Proof of Concept: Code, screenshots, or examples (if applicable)
5. Suggested Fix: If you have ideas for how to fix it
6. Your Contact Info: How we can reach you for follow-up questions

We are committed to responding quickly to security reports:

• Initial Response: Within 24 hours
• Status Update: Within 72 hours
• Fix Timeline: Within 7 days for critical issues, 30 days for others

Security researchers who responsibly disclose vulnerabilities will be:

• Credited in our security advisories (if desired)
• Listed in our hall of fame
• Thanked publicly (with permission)

Secure Pastebin implements multiple layers of security:

• HTML Escaping: All user content is escaped to prevent XSS attacks
• Content Validation: Suspicious patterns are detected and flagged
• Size Limits: Configurable maximum paste size (default: 1MB)
• Character Encoding: Proper UTF-8 handling and validation

• Secure IDs: Cryptographically secure paste identifiers (12+ characters)
• No Enumeration: Paste IDs cannot be guessed or brute-forced
• One-Time View: Optional automatic deletion after first access
• Manual Deletion: Recipients can delete pastes before expiration

• Creation Limits: Configurable per-IP paste creation limits
• View Limits: Configurable per-IP paste viewing limits
• Abuse Prevention: Automatic blocking of suspicious activity

• Automatic Cleanup: Expired pastes are automatically deleted
• No Persistent Storage: No permanent data storage beyond expiry
• IP Hashing: IP addresses are hashed for analytics (not stored raw)
• Minimal Logging: Only essential error information is logged

• Edge Computing: Runs on Cloudflare's secure global network
• TLS Encryption: All traffic is encrypted in transit
• KV Storage: Distributed storage with automatic TTL cleanup
• Zero Dependencies: Minimal external dependencies reduce attack surface

We are transparent about current limitations:

1. KV TTL Precision: Cloudflare KV TTL is approximate, not exact
2. Rate Limiting: Current implementation is basic; consider Durable Objects for stricter enforcement
3. Content Scanning: Pattern detection is heuristic-based, not comprehensive
4. Analytics Privacy: While IP addresses are hashed, consider disabling for maximum privacy

The following are generally considered out of scope for security reports:

• Public Pastes: Pastes are designed to be publicly accessible via their URLs
• No Authentication: The service is intentionally anonymous
• Temporary Storage: Data is not permanently stored

• Social Engineering: Issues requiring user interaction beyond normal usage
• Physical Access: Issues requiring physical access to user devices
• Browser Extensions: Issues specific to third-party browser extensions
• Denial of Service: Basic DoS attacks (rate limiting handles this)

• Cloudflare Issues: Security issues in Cloudflare's infrastructure
• Browser Bugs: Security issues in specific browsers
• Network Issues: Issues with user's network or ISP

For production deployments, we recommend:

# wrangler.toml
[vars]
MAX_PASTE_SIZE = "524288"        # 512KB max (reduce for tighter security)
RATE_LIMIT_CREATE = "5"          # 5 pastes per minute per IP
RATE_LIMIT_VIEW = "50"           # 50 views per minute per IP
ANALYTICS_ENABLED = "false"      # Disable for maximum privacy

The application automatically sets security headers:

• X-Content-Type-Options: nosniff
• X-Frame-Options: DENY
• X-XSS-Protection: 1; mode=block
• Referrer-Policy: strict-origin-when-cross-origin
• Content-Security-Policy: default-src 'self' (planned)

• Secrets Management: Use Wrangler secrets for sensitive configuration
• Environment Separation: Use separate KV namespaces for dev/staging/prod
• Access Control: Limit Cloudflare account access to necessary personnel

Regularly review your deployment:

1. Check KV Storage: Monitor for unusual paste patterns
2. Review Analytics: Look for suspicious usage patterns
3. Monitor Logs: Check Wrangler logs for errors or attacks
4. Test Rate Limits: Verify rate limiting is working correctly

We welcome security audits from:

• Security Researchers: Independent security reviews
• Bug Bounty Platforms: Coordinated disclosure programs
• Enterprise Users: Internal security assessments

• Cloudflare Workers Security
• OWASP Web Security
• Content Security Policy

• Wrangler Security Scanning
• npm audit for dependency scanning
• TypeScript strict mode for type safety

For security-related questions or concerns:

• Security Email: security@your-domain.com
• General Issues: GitHub Issues
• Documentation: This SECURITY.md file

Thank you for helping keep Secure Pastebin secure! 🔒