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You Should Know:
API security is critical in modern cybersecurity. Below are key commands and techniques to test and secure APIs:
1. API Reconnaissance with cURL
curl -X GET "https://api.example.com/users" -H "Authorization: Bearer <token>"
Use `-v` for verbose output to inspect headers and responses.
- Testing for Broken Object Level Authorization (BOLA)
curl -X GET "https://api.example.com/users/123" -H "API-Key: <key>"
Replace `123` with other IDs to check for unauthorized access.
3. Fuzzing API Endpoints with FFUF
ffuf -u "https://api.example.com/FUZZ" -w /path/to/wordlist.txt -H "Content-Type: application/json"
4. Exploiting Excessive Data Exposure
curl -X POST "https://api.example.com/login" -d '{"email":"[email protected]","password":"password"}' -H "Content-Type: application/json"
Check if APIs return sensitive data like tokens, passwords, or PII.
5. Detecting SQL Injection in APIs
sqlmap -u "https://api.example.com/data?id=1" --risk=3 --level=5
6. Rate Limit Testing
for i in {1..100}; do curl -X GET "https://api.example.com/account"; done
Check if the API enforces rate limiting.
7. JWT Token Tampering
Use jwt.io to decode and modify tokens. Test with:
curl -X GET "https://api.example.com/admin" -H "Authorization: Bearer <modified_jwt>"
- Automating API Tests with Postman & Newman
newman run api_test_collection.json -e environment.json
9. Checking CORS Misconfigurations
curl -H "Origin: https://evil.com" -I "https://api.example.com/data"
Look for `Access-Control-Allow-Origin: ` vulnerabilities.
- Using OWASP ZAP for API Security Testing
docker run -v $(pwd):/zap/wrk -t owasp/zap2docker zap-api-scan.py -t https://api.example.com/openapi.json -f openapi
What Undercode Say:
API security is a growing concern as APIs power modern web and mobile apps. Attackers exploit weak authentication, excessive data exposure, and misconfigurations. Always:
– Validate inputs
– Enforce strict rate limits
– Use OAuth2.0/OpenID Connect
– Monitor API logs for anomalies
🔍 Expected Output:
A well-tested API should return:
- Proper error messages (no stack traces)
- Rate-limiting headers (
X-RateLimit-Limit) - Secure CORS policies
- Minimal data exposure
Prediction:
As APIs become more central to digital transformation, automated API security tools (like Burp Suite API Scanner) will dominate penetration testing. Zero-trust API gateways will rise in adoption.
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References:
Reported By: Ouardi Mohamed – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
