Next.js Security Vulnerabilities and Mitigation Strategies

Guhaprasaanth Nandagopal

·

Follow

Published in

Stackademic

·

5 min read

·

Jul 1, 2024

13

Listen

Share

Introduction

Next.js is a powerful React framework used to build server-side rendering and static web applications. Despite its robust features, Next.js applications can still be susceptible to various security vulnerabilities. This article provides a comprehensive overview of common security vulnerabilities in Next.js and outlines strategies to mitigate or patch these issues.

1. Cross-Site Scripting (XSS)

Vulnerability

Cross-Site Scripting (XSS) is a common vulnerability that allows attackers to inject malicious scripts into web pages viewed by users. In Next.js applications, XSS can occur through user input fields, query parameters, or any dynamically rendered content.

Mitigation Strategies

• Sanitize User Input: Use libraries like DOMPurify to sanitize user inputs before rendering them in the browser.

const DOMPurify = require('dompurify');
const { JSDOM } = require('jsdom');

const window = new JSDOM('').window;
const purify = DOMPurify(window);

const cleanHTML = purify.sanitize(userInputHTML);

• Content Security Policy (CSP): Implement a CSP to restrict the sources from which scripts can be executed.