owasp-security

Q: How do I install owasp-security?

Run npx skills add https://github.com/hoodini/ai-agents-skills --skill owasp-security in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/owasp-security/ (personal) or .claude/skills/owasp-security/ (project).

by hoodiniSecurity

Implement secure coding practices following OWASP Top 10. Use when preventing security vulnerabilities, implementing authentication, securing APIs, or conducting security reviews. Triggers on OWASP, security, XSS, SQL injection, CSRF, authentication security, secure coding, vulnerability.

Installs: 3K
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/hoodini/ai-agents-skills --skill owasp-security

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads owasp-security automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

OWASP Top 10 Security

Prevent common security vulnerabilities in web applications.

OWASP Top 10 (2021)

#	Vulnerability	Prevention
A01	Broken Access Control	Proper authorization checks
A02	Cryptographic Failures	Strong encryption, secure storage
A03	Injection	Input validation, parameterized queries
A04	Insecure Design	Threat modeling, secure patterns
A05	Security Misconfiguration	Hardened configs, no defaults
A06	Vulnerable Components	Dependency scanning, updates
A07	Auth Failures	MFA, secure session management
A08	Data Integrity Failures	Input validation, signed updates
A09	Logging Failures	Comprehensive audit logs
A10	SSRF	URL validation, allowlists

A01: Broken Access Control

Prevention Patterns

// ❌ BAD: No authorization check
app.get('/api/users/:id', async (req, res) => {
  const user = await db.users.findById(req.params.id);
  res.json(user);
});

// ✅ GOOD: Verify ownership
app.get('/api/users/:id', authenticate, async (req, res) => {
  const userId = req.params.id;
  
  // Users can only access their own data
  if (req.user.id !== userId && req.user.role !== 'admin') {
    return res.status(403).json({ error: 'Forbidden' });
  }
  
  const user = await db.users.findById(userId);
  res.json(user);
});

// ✅ GOOD: Role-based access control (RBAC)
const requireRole = (...roles: string[]) => {
  return (req: Request, res: Response, next: NextFunction) => {
    if (!roles.includes(req.user?.role)) {
      return res.status(403).json({ error: 'Insufficient permissions' });
    }
    next();
  };
};

app.delete('/api/posts/:id', authenticate, requireRole('admin', 'moderator'), deletePost);

Insecure Direct Object Reference (IDOR)

// ❌ BAD: Predictable IDs exposed
GET /api/invoices/1001
GET /api/invoices/1002  // Can enumerate others' invoices

// ✅ GOOD: Use UUIDs + ownership check
app.get('/api/invoices/:id', authenticate, async (req, res) => {
  const invoice = await db.invoices.findOne({
    id: req.params.id,
    userId: req.user.id,  // Enforce ownership
  });
  
  if (!invoice) {
    return res.status(404).json({ error: 'Not found' });
  }
  
  res.json(invoice);
});

A02: Cryptographic Failures

Password Hashing

import bcrypt from 'bcrypt';
import crypto from 'crypto';

// ✅ Hash passwords with bcrypt
const SALT_ROUNDS = 12;

async function hashPassword(password: string): Promise<string> {
  return bcrypt.hash(password, SALT_ROUNDS);
}

async function verifyPassword(password: string, hash: string): Promise<boolean> {
  return bcrypt.compare(password, hash);
}

// ✅ Secure token generation
function generateSecureToken(length = 32): string {
  return crypto.randomBytes(length).toString('hex');
}

// ✅ Encrypt sensitive data
const ALGORITHM = 'aes-256-gcm';
const KEY = crypto.scryptSync(process.env.ENCRYPTION_KEY!, 'salt', 32);

function encrypt(text: string): { encrypted: string; iv: string; tag: string } {
  const iv = crypto.randomBytes(16);
  const cipher = crypto.createCipheriv(ALGORITHM, KEY, iv);
  
  let encrypted = cipher.update(text, 'utf8', 'hex');
  encrypted += cipher.final('hex');
  
  return {
    encrypted,
    iv: iv.toString('hex'),
    tag: cipher.getAuthTag().toString('hex'),
  };
}

function decrypt(encrypted: string, iv: string, tag: string): string {
  const decipher = crypto.createDecipheriv(ALGORITHM, KEY, Buffer.from(iv, 'hex'));
  decipher.setAuthTag(Buffer.from(tag, 'hex'));
  
  let decrypted = decipher.update(encrypted, 'hex', 'utf8');
  decrypted += decipher.final('utf8');
  
  return decrypted;
}

Secure Headers

import helmet from 'helmet';

app.use(helmet());
app.use(helmet.hsts({ maxAge: 31536000, includeSubDomains: true }));
app.use(helmet.contentSecurityPolicy({
  directives: {
    defaultSrc: ["'self'"],
    scriptSrc: ["'self'", "'strict-dynamic'"],
    styleSrc: ["'self'", "'unsafe-inline'"],
    imgSrc: ["'self'", 'data:', 'https:'],
    connectSrc: ["'self'"],
    fontSrc: ["'self'"],
    objectSrc: ["'none'"],
    frameAncestors: ["'none'"],
  },
}));

A03: Injection

SQL Injection Prevention

// ❌ BAD: String concatenation
const query = `SELECT * FROM users WHERE email = '${email}'`;

// ✅ GOOD: Parameterized queries
// With Prisma
const user = await prisma.user.findUnique({ where: { email } });

// With raw SQL (parameterized)
const user = await db.query('SELECT * FROM users WHERE email = $1', [email]);

// With Knex
const user = await knex('users').where({ email }).first();

NoSQL Injection Prevention

// ❌ BAD: Direct user input in query
const user = await User.findOne({ username: req.body.username });
// Attack: { "username": { "$gt": "" } } returns first user

// ✅ GOOD: Validate input type
import { z } from 'zod';

const loginSchema = z.object({
  username: z.string().min(3).max(50),
  password: z.string().min(8),
});

app.post('/login', async (req, res) => {
  const { username, password } = loginSchema.parse(req.body);
  const user = await User.findOne({ username: String(username) });
  // ...
});

Command Injection Prevention

import { execFile } from 'child_process';

// ❌ BAD: Shell injection
exec(`convert ${userInput} output.png`);  // userInput: "; rm -rf /"

// ✅ GOOD: Use execFile with array args
execFile('convert', [userInput, 'output.png'], (error, stdout) => {
  // Safe - arguments are not shell-interpreted
});

// ✅ GOOD: Validate and sanitize
const allowedFormats = ['png', 'jpg', 'gif'];
if (!allowedFormats.includes(format)) {
  throw new Error('Invalid format');
}

A04: Insecure Design

Rate Limiting

import rateLimit from 'express-rate-limit';

// General rate limit
const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // 100 requests per window
  standardHeaders: true,
  legacyHeaders: false,
});

// Strict limit for auth endpoints
const authLimiter = rateLimit({
  windowMs: 60 * 60 * 1000, // 1 hour
  max: 5, // 5 failed attempts
  skipSuccessfulRequests: true,
});

app.use('/api/', limiter);
app.use('/api/auth/', authLimiter);

Input Validation

import { z } from 'zod';

const userSchema = z.object({
  email: z.string().email(),
  password: z.string()
    .min(8)
    .regex(/[A-Z]/, 'Must contain uppercase')
    .regex(/[a-z]/, 'Must contain lowercase')
    .regex(/[0-9]/, 'Must contain number')
    .regex(/[^A-Za-z0-9]/, 'Must contain special character'),
  age: z.number().int().min(13).max(120),
  role: z.enum(['user', 'admin']).default('user'),
});

app.post('/api/users', async (req, res) => {
  try {
    const data = userSchema.parse(req.body);
    // Validated data is safe to use
  } catch (error) {
    if (error instanceof z.ZodError) {
      return res.status(400).json({ errors: error.errors });
    }
    throw error;
  }
});

A05: Security Misconfiguration

Environment Configuration

// ✅ Never expose stack traces in production
app.use((err: Error, req: Request, res: Response, next: NextFunction) => {
  console.error(err.stack); // Log for debugging
  
  res.status(500).json({
    error: process.env.NODE_ENV === 'production' 
      ? 'Internal server error' 
      : err.message,
  });
});

// ✅ Disable sensitive headers
app.disable('x-powered-by');

// ✅ Secure cookie configuration
app.use(session({
  secret: process.env.SESSION_SECRET!,
  cookie: {
    secure: process.env.NODE_ENV === 'production',
    httpOnly: true,
    sameSite: 'strict',
    maxAge: 24 * 60 * 60 * 1000, // 24 hours
  },
  resave: false,
  saveUninitialized: false,
}));

A06: Vulnerable Components

Dependency Scanning

# Check for vulnerabilities
npm audit
npm audit fix

# Use Snyk for deeper scanning
npx snyk test
npx snyk monitor

# Keep dependencies updated
npx npm-check-updates -u

// package.json - Use exact versions or ranges
{
  "dependencies": {
    "express": "^4.18.0",  // Minor updates OK
    "lodash": "4.17.21"    // Exact version
  },
  "overrides": {
    "vulnerable-package": "^2.0.0"  // Force safe version
  }
}

A07: Authentication Failures

Secure Session Management

import jwt from 'jsonwebtoken';

// ✅ JWT with short expiry + refresh tokens
function generateTokens(userId: string) {
  const accessToken = jwt.sign(
    { userId },
    process.env.JWT_SECRET!,
    { expiresIn: '15m' }  // Short-lived
  );
  
  const refreshToken = jwt.sign(
    { userId, type: 'refresh' },
    process.env.JWT_REFRESH_SECRET!,
    { expiresIn: '7d' }
  );
  
  return { accessToken, refreshToken };
}

// ✅ Secure password reset
async function initiatePasswordReset(email: string) {
  const user = await db.users.findByEmail(email);
  if (!user) return; // Don't reveal if email exists
  
  const token = crypto.randomBytes(32).toString('hex');
  const hashedToken = crypto.createHash('sha256').update(token).digest('hex');
  
  await db.passwordResets.create({
    userId: user.id,
    token: hashedToken,
    expiresAt: new Date(Date.now() + 60 * 60 * 1000), // 1 hour
  });
  
  await sendEmail(email, `Reset link: /reset?token=${token}`);
}

Multi-Factor Authentication

import { authenticator } from 'otplib';
import QRCode from 'qrcode';

// Setup TOTP
async function setupMFA(userId: string) {
  const secret = authenticator.generateSecret();
  const otpauth = authenticator.keyuri(userId, 'MyApp', secret);
  const qrCode = await QRCode.toDataURL(otpauth);
  
  await db.users.update(userId, { mfaSecret: encrypt(secret) });
  
  return { qrCode, secret };
}

// Verify TOTP
function verifyMFA(token: string, secret: string): boolean {
  return authenticator.verify({ token, secret });
}

A08: XSS Prevention

// ✅ React auto-escapes by default
const UserProfile = ({ user }) => (
  <div>{user.name}</div>  // Safe - auto-escaped
);

// ⚠️ Dangerous - avoid if possible
<div dangerouslySetInnerHTML={{ __html: sanitizedHtml }} />

// ✅ Sanitize HTML if needed
import DOMPurify from 'dompurify';

const sanitizedHtml = DOMPurify.sanitize(userHtml, {
  ALLOWED_TAGS: ['b', 'i', 'em', 'strong', 'a'],
  ALLOWED_ATTR: ['href'],
});

// ✅ Content Security Policy
app.use(helmet.contentSecurityPolicy({
  directives: {
    scriptSrc: ["'self'"],  // No inline scripts
    styleSrc: ["'self'", "'unsafe-inline'"],
  },
}));

A09: Logging & Monitoring

import winston from 'winston';

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.json()
  ),
  transports: [
    new winston.transports.File({ filename: 'error.log', level: 'error' }),
    new winston.transports.File({ filename: 'combined.log' }),
  ],
});

// ✅ Log security events
function logSecurityEvent(event: string, details: object) {
  logger.warn({
    type: 'security',
    event,
    ...details,
    timestamp: new Date().toISOString(),
  });
}

// Usage
logSecurityEvent('failed_login', { email, ip: req.ip, userAgent: req.headers['user-agent'] });
logSecurityEvent('access_denied', { userId, resource, action });
logSecurityEvent('suspicious_activity', { userId, pattern: 'rapid_requests' });

A10: SSRF Prevention

import { URL } from 'url';

// ✅ Validate URLs against allowlist
const ALLOWED_HOSTS = ['api.example.com', 'cdn.example.com'];

function isAllowedUrl(urlString: string): boolean {
  try {
    const url = new URL(urlString);
    
    // Block private IPs
    const privatePatterns = [
      /^localhost$/i,
      /^127\./,
      /^10\./,
      /^172\.(1[6-9]|2[0-9]|3[01])\./,
      /^192\.168\./,
      /^0\./,
      /^169\.254\./,  // Link-local
    ];
    
    if (privatePatterns.some(p => p.test(url.hostname))) {
      return false;
    }
    
    // Check allowlist
    return ALLOWED_HOSTS.includes(url.hostname);
  } catch {
    return false;
  }
}

app.post('/api/fetch-url', async (req, res) => {
  const { url } = req.body;
  
  if (!isAllowedUrl(url)) {
    return res.status(400).json({ error: 'URL not allowed' });
  }
  
  const response = await fetch(url);
  // ...
});

Security Checklist

## Pre-Deployment Checklist

### Authentication
- [ ] Passwords hashed with bcrypt (cost ≥ 12)
- [ ] JWT tokens have short expiry
- [ ] Session cookies are httpOnly, secure, sameSite
- [ ] Rate limiting on auth endpoints

### Authorization
- [ ] All endpoints have auth checks
- [ ] RBAC implemented correctly
- [ ] No IDOR vulnerabilities

### Input/Output
- [ ] All input validated with Zod/Joi
- [ ] SQL queries parameterized
- [ ] XSS prevented (CSP, escaping)
- [ ] File uploads validated and sandboxed

### Infrastructure
- [ ] HTTPS enforced
- [ ] Security headers configured
- [ ] Dependencies audited
- [ ] Secrets in environment variables

### Monitoring
- [ ] Security events logged
- [ ] Error monitoring enabled
- [ ] Alerts configured

Resources

OWASP Top 10: https://owasp.org/Top10/
OWASP Cheat Sheets: https://cheatsheetseries.owasp.org/
Node.js Security: https://nodejs.org/en/docs/guides/security/
Snyk: https://snyk.io/

FAQ

What does the owasp-security skill do?

How do I install owasp-security?

Run npx skills add https://github.com/hoodini/ai-agents-skills --skill owasp-security in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/owasp-security/ (personal) or .claude/skills/owasp-security/ (project).

Which AI agents can use owasp-security?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is owasp-security safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains owasp-security?

It is published by hoodini in hoodini/ai-agents-skills. It has 3,028 recorded installs.

More from hoodini/ai-agents-skills

View all →

github-trending

hoodini/ai-agents-skills

Fetch and display GitHub trending repositories and developers. Use when building dashboards showing trending repos, discovering popular projects, or tracking GitHub trends. Triggers on GitHub trending, trending repos, popular repositories, GitHub discover.

AI & Agents3.2K installs

mongodb

hoodini/ai-agents-skills

Work with MongoDB databases using best practices. Use when designing schemas, writing queries, building aggregation pipelines, or optimizing performance. Triggers on MongoDB, Mongoose, NoSQL, aggregation pipeline, document database, MongoDB Atlas.

Data & Databases1.7K installs

mobile-responsiveness

hoodini/ai-agents-skills

Build responsive, mobile-first web applications. Use when implementing responsive layouts, touch interactions, mobile navigation, or optimizing for various screen sizes. Triggers on responsive design, mobile-first, breakpoints, touch events, viewport.

Mobile1.4K installs

google-workspace-cli

hoodini/ai-agents-skills

Open the skill to read its SKILL.md instructions.

Productivity & Automation455 installs

web-accessibility

hoodini/ai-agents-skills

Open the skill to read its SKILL.md instructions.

Frontend & Design455 installs

figma

hoodini/ai-agents-skills

Open the skill to read its SKILL.md instructions.

Frontend & Design449 installs

Popular security skills

View category →

azure-compliance

microsoft/azure-skills

Run Azure compliance and security audits with azqr plus Key Vault expiration checks. Covers best-practice assessment, resource review, policy/compliance validation, and security posture checks. WHEN: compliance scan, security audit, BEFORE running azqr (compliance cli tool), Azure best practices, Key Vault expiration check, expired certificates, expiring secrets, orphaned resources, compliance assessment.

OfficialSecurity567K installs

minimal-run-and-audit

lllllllama/rigorpilot-skills

Rigor Run skill for README-first deep learning repo reproduction. Use when the task is specifically to capture or normalize evidence from the selected smoke test or documented inference or evaluation command and write standardized reprooutputs/ files, including patch notes when repository files changed. Do not use for training execution, initial repo intake, generic environment setup, paper lookup, target selection, hidden scientific-meaning changes, or end-to-end orchestration by itself.

Security477.4K installs

seo-audit

coreyhaines31/marketingskills

When the user wants to audit, review, or diagnose SEO issues on their site. Also use when the user mentions "SEO audit," "technical SEO," "why am I not ranking," "SEO issues," "on-page SEO," "meta tags review," "SEO health check," "my traffic dropped," "lost rankings," "not showing up in Google," "site isn't ranking," "Google update hit me," "page speed," "core web vitals," "crawl errors," "indexing issues," "stuck on page 2," "striking distance keywords," "title tag rewrite," "low CTR," "local SEO," "Google Business Profile," or "map pack." Use this even if the user just says something vague like "my SEO is bad" or "help with SEO" — start with an audit. For building pages at scale to target keywords, see programmatic-seo. For adding structured data, see schema. For AI search optimization, see ai-seo.

Security238.7K installs

firebase-security-rules-auditor

firebase/agent-skills

Audits Firebase (Firestore, Cloud Storage) security rules for vulnerabilities, privilege escalation, role bypasses, create vs update inconsistencies, resource exhaustion, type safety, size limits, and hasOnly ownership checks. Use when auditing/reviewing rules, running red-team rule assessments, or scoring against auditor checklists. Don't use for Firebase CLI (login, deploy), Auth, Crashlytics, Remote Config, or database queries.

OfficialSecurity139.1K installs

audit

pbakaus/impeccable

Run technical quality checks across accessibility, performance, theming, responsive design, and anti-patterns. Generates a scored report with P0-P3 severity ratings and actionable plan. Use when the user wants an accessibility check, performance audit, or technical quality review.

Security81.9K installs

competitors

coreyhaines31/marketingskills

When the user wants to create competitor comparison or alternative pages for SEO and buyer-facing use. Also use when the user mentions 'alternative page,' 'vs page,' 'competitor comparison,' 'comparison page,' '[Product] vs [Product],' '[Product] alternative,' 'competitive landing pages,' 'how do we compare to X,' 'competitor teardown,' 'audit our competitor pages,' 'are our comparison pages out of date,' or 'competitive asset audit.' Use this for any content that positions your product against competitors. Covers four formats: singular alternative, plural alternatives, you vs competitor, and competitor vs competitor. For auditing existing claims (not researching competitors from scratch, which is competitor-profiling; not technical SEO on these pages, which is seo-audit), use the asset audit here. For internal battle cards and sales-specific competitor docs, see sales-enablement.

Security79.3K installs

owasp-security

Install

Install

Describe the task

Review the result

SKILL.md

OWASP Top 10 Security

OWASP Top 10 (2021)

A01: Broken Access Control

Prevention Patterns

Insecure Direct Object Reference (IDOR)

A02: Cryptographic Failures

Password Hashing

Secure Headers

A03: Injection

SQL Injection Prevention

NoSQL Injection Prevention

Command Injection Prevention

A04: Insecure Design

Rate Limiting

Input Validation

A05: Security Misconfiguration

Environment Configuration

A06: Vulnerable Components

Dependency Scanning

A07: Authentication Failures

Secure Session Management

Multi-Factor Authentication

A08: XSS Prevention

A09: Logging & Monitoring

A10: SSRF Prevention

Security Checklist

Resources

FAQ

More from hoodini/ai-agents-skills

Popular security skills