5 Common Server Vulnerabilities in Node.js (and How to Fix Them)

As powerful and flexible as Node.js is, security concerns can emerge if applications aren’t properly secured. Let’s look at five common vulnerabilities in Node.js applications and practical steps to mitigate each one.

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1. Injection Attacks (SQL Injection, Command Injection)

The Problem

Injection attacks occur when untrusted data is sent to an interpreter as part of a command or query. Attackers can manipulate data to execute unintended commands, gain unauthorized access, or modify data. SQL injection and command injection are common types of this vulnerability.

How to Mitigate

• Use ORM/Query Builders: Instead of directly writing SQL queries, use an ORM like Sequelize or TypeORM to handle data operations, as they help prevent injection attacks.
• Parameterized Queries: Always use parameterized queries or prepared statements for any raw SQL.
• Validate User Input: Use libraries like validator or Joi to sanitize and validate incoming data.

Example

// BAD: susceptible to SQL injection…