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Fix Insufficient Logging & Monitoring in Nitro

Insufficient logging in Nitro applications creates a visibility vacuum, allowing attackers to perform credential stuffing, data exfiltration, or privilege escalation without detection. Default console output is insufficient for forensics; you need structured, centralized logging of all security-relevant events to bridge the gap between 'breached' and 'unaware'.

The Vulnerable Pattern

// routes/api/auth/login.post.ts
export default defineEventHandler(async (event) => {
  const { email, password } = await readBody(event);
  const user = await db.users.findUnique({ where: { email } });

if (!user || !compare(password, user.hash)) {
// VULNERABILITY: No log entry created for failed login attempt.
// Attacker can brute-force without triggering any alerts.
throw createError({ statusCode: 401, message: ‘Unauthorized’ });
}


return { token: generateToken(user) };
});

The Secure Implementation

The vulnerable code fails to record failed authentication attempts, making it impossible to detect brute-force or credential stuffing attacks. The secure version implements structured logging using Pino. It captures the event type, the targeted identity, the source IP, and the User-Agent. This data allows SIEM tools to trigger alerts on high-frequency 401 errors. Additionally, it logs system errors (500s) with stack traces for debugging while ensuring sensitive credentials (passwords) are never written to the log files.

// utils/logger.ts
import pino from 'pino';
export const logger = pino({ level: 'info' });

// routes/api/auth/login.post.ts
export default defineEventHandler(async (event) => {
const { email } = await readBody(event);
const ip = getRequestIP(event, { xForwardedFor: true });


try {
const user = await db.users.findUnique({ where: { email } });
if (!user || !compare(password, user.hash)) {
logger.warn({
event: ‘AUTH_FAILURE’,
identity: email,
remote_ip: ip,
ua: getRequestHeader(event, ‘user-agent’)
});
throw createError({ statusCode: 401, message: ‘Unauthorized’ });
}


logger.info({ 
  event: 'AUTH_SUCCESS', 
  user_id: user.id, 
  remote_ip: ip 
});
return { token: generateToken(user) };


} catch (err) {
if (err.statusCode !== 401) {
logger.error({ event: ‘SYSTEM_ERROR’, error: err.message, stack: err.stack });
}
throw err;
}
});

System Alert • ID: 9336
Target: Nitro API
Potential Vulnerability

Your Nitro API might be exposed to Insufficient Logging & Monitoring

74% of Nitro apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.

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