Is it bad to use dangerouslySetInnerHTML?

Is it bad to use dangerouslySetInnerHTML?

Dynamically rendering benign HTML code in React requires the use of dangerouslySetInnerHTML . That is not a naming mistake. This property is dangerous, and using it carelessly will create XSS vulnerabilities in your application.

Is React safe against XSS?

When an application creates new elements through the React APIs, React is aware of the potential danger of XSS. As a result, React will automatically ensure that data that ends up in the page will not cause XSS attacks. The code snippet below shows a code example of the createElement() API.

How secure is Reactjs?

React is widely used for web application development but it does not provide default security measures against Cross Site Request Forgery (CSRF) attacks. CSRF attacks take place through unauthorized cookies placed within your web app by the perpetrator or by the unintended cookies.

Why is dangerously set HTML bad?

Dangerously Set innerHTML This feature is designed to present and insert DOM formatted content data into the frontend. The use of the feature is a bad practice, especially when dealing with user inputs and dynamic data. You must consider its vulnerabilities in order to prevent XSS attack.

Does react escape HTML?

Does react escape html tags and new line breaks in a string that we try to render? It says clearly that by default React DOM escapes any values embedded in JSX unless it is explicitly written in code. There may be instances where we may need to set HTML strings in React.

How do I make my react site secure?

To further secure your React authentication, consider the following:

1. Utilize OAuth and JSON Web Token (JWT).
2. You can also consider using Passport.
3. Consider using the React Router library to secure your app against URL-related vulnerabilities.

What is dangerously set HTML?

The prop name dangerouslySetInnerHTML is intentionally chosen to be frightening, and the prop value (an object instead of a string) can be used to indicate sanitized data. You need to make sure your HTML is structured properly and sanitized before inserting it into your page.

Which attribute is replacing innerHTML in browser DOM?

dangerouslySetInnerHTML
dangerouslySetInnerHTML is an attribute under DOM elements in React. According to the official documentation, dangerouslySetInnerHTML is React’s replacement for using innerHTML in the browser DOM.

How to prevent XSS attacks when using dangerouslysetinnerhtml in react?

You must consider its vulnerabilities in order to prevent XSS attack. “Easy” to make thing safe is one of React philosophy. React is flexible and extendable which means that the bad practice can be turning into the best practice. Sanitizing props value is one obvious option and strongly recommended.

What do you need to know about XSS in react?

There are still some XSS attack vectors that you need to handle yourself in React! 1. XSS via dangerouslySetInnerHTML When you use dangerouslySetInnerHTML you need to make sure the content doesn’t contain any javascript. React can’t do here anything for you. 2. XSS via a.href attribute 3. XSS via attacker controlled props

Is there a proof of concept for XSS?

Below is a proof-of-concept of an XSS attack. Binding the review shown above with dangerouslySetInnerHTML will cause the script code to be executed. Note that the alert () function is harmless, but that an attacker could use the same attack vector to take control of the application in the user’s browser.

Which is dangerous part of HTML in react?

As you can see, the benign parts of the HTML are still intact. The dangerous parts, however, are taken out by the sanitizer. In this case, the dangerous part is the onerror attribute of the img tag, which is capable of triggering JavaScript execution.