Backend Application Security

VerifiedSafe

Secures backend applications by addressing OWASP Top 10 vulnerabilities, implementing authentication (JWT, OAuth2) and encryption (bcrypt, TLS), and configuring vulnerability scanning tools (SAST, DAST, SCA). Helps achieve compliance with frameworks like GDPR, HIPAA, PCI-DSS, and SOC2, and includes incident response procedures.

Sby Skills Guide Bot
SecurityAdvanced
406/2/2026
Claude CodeCursorWindsurf
#owasp-top-10#authentication#encryption#compliance#vulnerability-scanning

Recommended for

Our review

Helps secure backend applications by implementing authentication, encryption, vulnerability scanning, and compliance checks against OWASP threats.

Strengths

  • Comprehensive coverage of OWASP Top 10 with concrete code examples
  • Integration with scanning tools (SAST, DAST, SCA) and secret detection
  • Support for compliance frameworks (GDPR, HIPAA, PCI-DSS, SOC2)
  • Code examples for authentication, SQL injection prevention, and security headers

Limitations

  • Focuses on code-level security, not infrastructure or network
  • May require additional configuration for specific environments
  • Limited to backend applications as described
When to use it

When building or auditing backend code for security vulnerabilities, implementing authentication/encryption, or preparing for compliance audits.

When not to use it

For frontend security, network security, or non-software security assessments.

Security analysis

Safe
Quality score92/100

This skill provides static security guidance and best practices; it contains no executable commands, destructive instructions, or data exfiltration risks.

No concerns found

Examples

OWASP Vulnerability Scan
Check my code for OWASP vulnerabilities
JWT Authentication
Implement JWT authentication securely
GDPR Compliance Audit
Prepare for GDPR compliance audit

name: security description: Secure backend applications against OWASP threats. Implement authentication, encryption, scanning, compliance, and incident response procedures. sasmp_version: "2.0.0" bonded_agent: 07-testing-security bond_type: PRIMARY_BOND

=== PRODUCTION-GRADE SKILL CONFIG (SASMP v2.0.0) ===

atomic_operations:

  • VULNERABILITY_SCAN
  • AUTH_IMPLEMENTATION
  • ENCRYPTION_CONFIG
  • COMPLIANCE_CHECK

parameter_validation: query: type: string required: true minLength: 5 maxLength: 2500 security_focus: type: string enum: [owasp, compliance, scanning, auth] required: false compliance_framework: type: string enum: [gdpr, hipaa, pci-dss, soc2] required: false

retry_logic: max_attempts: 2 backoff: exponential initial_delay_ms: 1500

logging_hooks: on_invoke: "skill.security.invoked" on_success: "skill.security.completed" on_error: "skill.security.failed"

exit_codes: SUCCESS: 0 INVALID_INPUT: 1 CRITICAL_VULNERABILITY: 2 COMPLIANCE_VIOLATION: 3

Security Skill

Bonded to: testing-security-agent


Quick Start

# Invoke security skill
"Check my code for OWASP vulnerabilities"
"Implement JWT authentication securely"
"Prepare for GDPR compliance audit"

Instructions

  1. Assess Risks: Identify threats and vulnerabilities
  2. Implement Controls: Add authentication, encryption
  3. Configure Scanning: Set up SAST, DAST, SCA
  4. Ensure Compliance: Meet regulatory requirements
  5. Prepare Response: Create incident response plan

OWASP Top 10 (2025)

| # | Vulnerability | Prevention | Severity | |---|---------------|------------|----------| | 1 | Broken Access Control | RBAC, least privilege | Critical | | 2 | Cryptographic Failures | Strong encryption, TLS | Critical | | 3 | Injection | Parameterized queries | Critical | | 4 | Insecure Design | Threat modeling | High | | 5 | Security Misconfiguration | Hardening | High | | 6 | Vulnerable Components | SCA scanning | High | | 7 | Auth Failures | MFA, secure sessions | High | | 8 | Data Integrity Failures | Signatures | Medium | | 9 | Logging Failures | Audit logging | Medium | | 10 | SSRF | Input validation | Medium |


Security Scanning Tools

| Type | Purpose | Tools | |------|---------|-------| | SAST | Static code | SonarQube, Semgrep | | DAST | Dynamic testing | OWASP ZAP, Burp | | SCA | Dependencies | Snyk, Dependabot | | Container | Images | Trivy, Grype | | Secrets | Detection | GitLeaks, TruffleHog |


Examples

Example 1: Secure Authentication

from fastapi import Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer
from passlib.context import CryptContext
from jose import jwt
import secrets

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

def hash_password(password: str) -> str:
    return pwd_context.hash(password)

def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)

def create_token(user_id: str) -> str:
    return jwt.encode(
        {"sub": user_id, "jti": secrets.token_urlsafe(16)},
        SECRET_KEY,
        algorithm="HS256"
    )

Example 2: SQL Injection Prevention

# BAD - Vulnerable to SQL injection
def get_user_bad(user_id: str):
    query = f"SELECT * FROM users WHERE id = '{user_id}'"
    return db.execute(query)

# GOOD - Parameterized query
def get_user_good(user_id: str):
    query = "SELECT * FROM users WHERE id = :id"
    return db.execute(query, {"id": user_id})

Example 3: Security Headers

from fastapi import FastAPI
from starlette.middleware.base import BaseHTTPMiddleware

class SecurityHeadersMiddleware(BaseHTTPMiddleware):
    async def dispatch(self, request, call_next):
        response = await call_next(request)
        response.headers["X-Content-Type-Options"] = "nosniff"
        response.headers["X-Frame-Options"] = "DENY"
        response.headers["X-XSS-Protection"] = "1; mode=block"
        response.headers["Strict-Transport-Security"] = "max-age=31536000"
        response.headers["Content-Security-Policy"] = "default-src 'self'"
        return response

app = FastAPI()
app.add_middleware(SecurityHeadersMiddleware)

Compliance Checklists

GDPR

  • [ ] Lawful basis for processing
  • [ ] Data minimization
  • [ ] Right to access/deletion
  • [ ] Breach notification (72h)
  • [ ] DPO if required

PCI-DSS

  • [ ] Encrypt cardholder data
  • [ ] No CVV storage
  • [ ] Access controls
  • [ ] Regular testing
  • [ ] Audit logging

Troubleshooting

Common Issues

| Issue | Cause | Solution | |-------|-------|----------| | Token expired | Short TTL | Implement refresh tokens | | CORS blocked | Missing headers | Configure CORS properly | | Weak encryption | Old algorithms | Use AES-256, RSA-2048+ | | SQL injection | String concat | Use parameterized queries |

Incident Response

Incident Detected
    │
    ├─→ Contain: Isolate affected systems
    ├─→ Assess: Determine scope
    ├─→ Remediate: Fix vulnerability
    ├─→ Recover: Restore services
    └─→ Post-mortem: Document & improve

Test Template

# tests/test_security.py
import pytest

class TestSecurityControls:
    def test_password_is_hashed(self):
        password = "secure123"
        hashed = hash_password(password)
        assert password not in hashed
        assert verify_password(password, hashed)

    def test_sql_injection_prevented(self):
        malicious_input = "'; DROP TABLE users; --"
        # Should not execute the DROP TABLE
        result = get_user(malicious_input)
        assert result is None  # User not found, not table dropped

    def test_auth_required_for_protected_routes(self, client):
        response = client.get("/api/v1/users/me")
        assert response.status_code == 401

Resources

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