Having gained popularity due to its wealth of powerful features and ease of usage, React is one of the most popular JavaScript libraries the industry has ever seen for front-end development.

A well-structured framework such as React is used in building a mobile application that allows you to inject JavaScript code right into an HTML document using JSX syntax. ReactJs is also a fantastic framework for those seeking a dynamic user interface that requires minimal effort.

Nowadays, React's simplicity and flexibility make it a prevalent framework. A lot of websites and developers use React over other frameworks.

With so many security breaches arising, ensuring your React Applications is secure is more critical than ever. A React security breach can go undetected at first glance, resulting in serious consequences.

Although React is less risky than other frameworks, any bad decision can lead to serious problems.

In this article, we have listed the best React app security practices to help you keep yourself protected from the breaches. 

React Security Vulnerabilities

Today, in an era when more and more data is being shared, it is vital that you maintain awareness of the risks associated with React apps. 

Despite having fewer vulnerabilities than other frameworks, React is not completely secure. With React's ability to integrate with other open-source apps and flimsy security defaults, security breaches will likely occur.

Various applications daily share a large amount of personal data. Thus, there is a greater possibility (and danger) of exposing confidential and financial information. 

A company that uses React might also be more likely to face violations of privacy regulations.

Top Security Threats to a ReactJS Application

The ReactJS framework has several vulnerabilities, but many of the vulnerabilities have been eliminated by recent updates. While there are significant attacks against React, you must be aware of them before creating a security checklist.

Cross-Site Scripting (XSS)

XSS is one of the most serious client-side vulnerabilities. During a malicious attack, an attacker could add malicious code to your program, which would be read as valid code and executed as part of your application. User data and app functionality are compromised.

SQL Injection

A vulnerability in your application exposes the database. By injecting harmful SQL code, an attacker can edit data without obtaining permission from the owner.

There are many ways a hacker can access sensitive data in your app, including creating fake IDs and taking control of the app's administration.

Cross-Site Request Forgery (CSRF)

It refers to a cyber attack in which the attacker creates a web page or an email that attempts to persuade the user to grant specific permissions to change the application's state.

The JavaScript programming language offers an alternative method for creating such requests, but a browser will block this code unless your web application server explicitly allows it. To put it another way, attackers bypass ReactJS and execute malicious code to gain access to sensitive data.

Arbitrary Code Execution

Generally, this threat allows an attacker to run arbitrary commands on the processes associated with your application.

In addition to being dangerous, these random commands may modify your configuration files or parts of your code.

Distributed Denial of Service (DDoS)

DDoS attacks overwhelm web applications with more data than they can handle. They aim to prevent consumers from accessing their programs by blocking them from accessing the web. 

Several commonly used DDoS attack techniques, including UDP, ICMP, SYN, and HTTP query flooding, perform DDoS attacks. 

A hacker attempts to deplete servers' and application firewalls' storage and processing time to deplete reactions.

React application Security Best Practices

Prevention goes a long way, so make your app secure and follow proper protocols.

There may not be a vulnerability that you have thought about, but mitigating the most common risks can help you make your application more secure.

Take care with sensitive data.

Keeping sensitive data out of the hands of users is one of the most important things you must remember when developing your React security checklist. In React, store secrets inside .env files and validate them on the server to avoid handling sensitive data.

Using the React SDK, sensitive data can be scrubbed from events. To prevent excessive data exposure, you should also use the React XSS protection when data binding, monitoring dangerous URLs, and refactoring REST API endpoints to prevent data exfiltration.

Make use of multifactor authentication.

Multifactor authentication provides an additional layer of security for ReactJS applications and protects users' sensitive information. 

This ensures that only legitimate users are authorized to access data. It is essential to leverage two-factor authentication when developing ReactJS applications, and users receive a passcode assigned to them by their credentials.

The two-factor authentication system ensures users are fully authenticated before accessing any data on the web.

Make your React APIs secure.

There's a good and bad to React APIs in that you can connect your app to different services and access their data. These devices are capable of storing information and executing commands, exposing your app to XSS attacks and SQL injections.

Validating all API functions against their API schemas is a robust mitigation strategy to address this vulnerability. Similarly, make sure schemas are validated regularly and encrypt all communications with SSL/TLS.

If you intend to transmit data using APIs, ensure that benign characters are used instead of <.

window.__PRELOADED_STATE__ = ${JSON.stringify(preloadedState).replace( /</g, '\\u003c')}


As one of the essential ReactJS security best practices, you should use HTTPS to protect your data and sensitive information from hackers and other attackers. 

Obtaining and installing an SSL certificate on the server is the best way to ensure the security of the ReactJS application, and it makes your connection to the server secure.

Using cryptographic encryption, SSL certificates encrypt and secure data with security keys. In order to obtain an SSL certificate, you must submit a certificate-signing request (CSR) with all the necessary details about your organization.

Don't serialize sensitive stuff.

The initial state of your React app is likely to be set with JSON. This can lead to potential danger because JSON.stringify() is a function that converts a string from almost any kind of data into a string without attempting to identify malicious values in the data. 

Injection of JS objects that change valid data, such as usernames and passwords, is very easy for an attacker to manipulate the data.

<script>window.__STATE__ = ${JSON.stringify({ data })}</script>

It is possible to escape rendered JSON using the serialize-javascript NPM module or avoid serialization using complex JSON formats. To prevent mishaps or errors, the best way to simplify matters is to omit confidential data as part of the serialized form.


Creating a React application involves several potential threats. The lack of adequate security measures could mean that your app becomes the victim of a cyber-attack which would cause financial loss, wasted time, a breach of trust, and even legal problems in the future.

The complexity and difficulty of securing your React app can increase as new threats emerge, and attackers exploit more loopholes.

Hire Reactjs developers specializing in security or outsource it to a company specializing in React Js Development Services. Don't leave it to chance when it comes to security!