Common Owasp

OWASP Top 10 Security Checklist

Priority: P0 (CRITICAL)

Always-Apply Rules

Apply these on every code write, not during dedicated security reviews:

• No IDOR: Filter every resource query by owner_id or tenantId alongside any user-supplied ID. findById(params.id) without owner filter immediate P0.
• No wildcard CORS: Restrict to explicit allowlisted origins — never Access-Control-Allow-Origin: * on authenticated routes.
• No full entity return: Always project to DTO — never serialize raw ORM output to API response.
• No plaintext secrets in mobile: Never store tokens in SharedPreferences/UserDefaults — use Keychain/Keystore.

Context-Specific Checklist

Activate when: writing security-sensitive features, reviewing PRs, or doing codebase audits.

Mark each item: ✅ not affected | ⚠️ needs review | 🔴 confirmed finding.

P0 finding caps Security score at 40/100.

Apply framework-specific security skills alongside this checklist. See [references/owasp-web.md](references/owasp-web.md), [references/owasp-api.md](references/owasp-api.md), and [references/owasp-mobile.md](references/owasp-mobile.md) for full detection signals.

OWASP Web Application Top 10 (2021)

| ID | Risk | Key Detection Signal | | --- | ---- | -------------------- | | A01 | Broken Access Control | findById(params.id) without owner filter. Route without @authorize. | | A02 | Cryptographic Failures | Weak hash (MD5/SHA1) for passwords. HTTP URL hardcoded. No TLS. | | A03 | Injection | String concat in DB queries. Unsanitized input to templates. XSS. | | A04 | Insecure Design | No rate limiting on auth. Missing input validation at entry points. | | A05 | Security Misconfiguration | CORS *. Debug mode in prod. Missing security headers (CSP, HSTS). | | A06 | Vulnerable Components | CVE in dependency audit. Unreviewed new direct dependency. | | A07 | Auth Failures | JWT without expiry. No session invalidation on logout. | | A08 | Data Integrity Failures | Unverified JWT/cookie. Deserialization of untrusted input. | | A09 | Logging & Monitoring | No audit log on: deletion, password change, privilege escalation. | | A10 | SSRF | HTTP client with user-controlled URL and no allowlist. |

OWASP API Security Top 10 (2023)

| ID | Risk | Key Detection Signal | | ----- | ---- | -------------------- | | API1 | Broken Object Level Auth (BOLA) | Resource by user-supplied ID without AND owner_id = currentUser. | | API2 | Broken Authentication | JWT missing exp. Token not revoked on logout. Bearer in URL. | | API3 | Broken Property Level Auth | Full ORM entity returned. No DTO projection. Mass assignment. | | API4 | Unrestricted Resource Consumption | No server-enforced limit/pageSize. No throttle on heavy ops. | | API5 | Broken Function Level Auth | Admin route reachable without role guard. | | API6 | Unrestricted Business Flow | No verification on OTP/checkout/password-reset flows. | | API8 | Security Misconfiguration | Stack trace in response. CORS * on authenticated routes. | | API9 | Improper Inventory Management | Deprecated/undocumented endpoints still reachable. | | API10 | Unsafe API Consumption | Third-party response used without schema validation. |

OWASP Mobile Top 10 (2024)

| ID | Risk | Key Detection Signal | | --- | ---- | -------------------- | | M1 | Improper Credential Usage | API keys in BuildConfig, Info.plist, hardcoded in source. | | M2 | Inadequate Supply Chain | Unverified SDKs, pods, or packages without lock files. | | M3 | Insecure Auth/AuthZ | Biometric-only auth without server validation. Local role checks. | | M4 | Insufficient I/O Validation | WebView loadUrl with user data. Intent data used unvalidated. | | M5 | Insecure Communication | No cert pinning. cleartextTrafficPermitted=true. ATS exceptions. | | M6 | Inadequate Privacy | Location/contacts without justification. PII in analytics. | | M7 | Insufficient Binary Protection | No obfuscation. android:debuggable=true. No root detection. | | M8 | Security Misconfiguration | Exported components. Backup enabled. Debug endpoints. | | M9 | Insecure Data Storage | Tokens in SharedPreferences/UserDefaults vs Keychain/Keystore. | | M10 | Insufficient Cryptography | Hardcoded encryption keys. Deprecated algorithms (DES, RC4). |

References

• [OWASP Web App — Full Detection Signals](references/owasp-web.md)
• [OWASP API — Full Detection Signals](references/owasp-api.md)
• [OWASP Mobile — Full Detection Signals](references/owasp-mobile.md)

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: HoangNguyen0403
• Source: HoangNguyen0403/agent-skills-standard
• License: Apache-2.0
• Homepage: https://www.npmjs.com/package/agent-skills-standard

Install and usage instructions live in the source repository linked above.