Is it possible for a website to be compromised by incorporating CSS within HTML code?

I'm currently working on developing a shopping cart component in React, but my supervisor has advised against using CSS directly in the HTML markup due to security concerns. While I understand the importance of good coding practices, I fail to see how including CSS styles in the HTML code could lead to potential hacking vulnerabilities. Besides, I am utilizing Material UI for styling which primarily consists of props rather than traditional CSS. As far as I know, Material UI does not expose component props in the inspect tool, so I'm puzzled by his reasoning.

htmlcssreactjsmaterial-uiwebsecurity

Answer №1

  1. No, hacking a website using CSS is not possible.
  2. It is recommended to store the styling code in an external script or utilize the style prop when constructing the component.

jsx

import { styles } from './mycss.css';
function app(){
    return (<div className={styles.mycomponent}>
        content here
    </div>);
}

css

.mycomponent {
   display: block;
   background: red;
}

note

An outsider can only temporarily modify what is displayed on their own browser and machine.

Answer №2

While CSS3 can be vulnerable to exploits in rare cases, it is still important to take precautions to protect your website. Ensuring secure usage of CSS selectors and keeping CSS files separate from HTML files can help mitigate these risks.

It is always recommended to follow best practices by maintaining separation between CSS and HTML files.

For more information:

  • Example of an old CSS exploit:
  • How to secure your CSS Selectors:

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Jump to Anchor when Page Reloads

Hey there! I'm currently developing a gallery script and I'm trying to figure out how to automatically position the page to the top of a specific anchor when it is loaded. I attempted to use the following code: <script>location.href = "#tr ...

javascriptjqueryhtml

Superimpose above the tbody

I am attempting to implement a loading overlay specifically on top of the tbody element. My current method involves adding a tr as the last child of tbody and positioning it using position: absolute, while setting the parent tbody with position: relative. ...

htmlcss

Utilizing local component files as packages in NPM: A comprehensive guide

Lately, I've been working on a substantial project using React along with react-router-dom. However, I recently started incorporating NextJS into the project and noticed that it lacks some features that are present in react-router-dom. To address this ...

reactjsnext.js

Deactivate a Button until Another One is Clicked in React

Is there a way to disable the submit button until a rating has been provided? My Current State this.state = { stars: [ { active: false }, { active: false }, { active: false }, { active: false }, { active: fal ...

javascriptreactjsbuttonreact-native

Activate the opening of a .docx file in a new tab by utilizing an anchor tag

I have attached a docx file containing the terms and conditions for our project. Now, I would like to open it in a new tab. By clicking this link, you can view the <a title="click to view terms and conditions" style="color:blue;" target="_blank" href ...

javascripthtmlasp.nethrefdocx

Different ways to format text

I have a query about how to style the text differently. My goal is to make the number stand out by displaying it larger than the rest of the text. Can someone guide me on applying inline styling with the provided code snippet? Here is the CSS attribute fo ...

reactjsmaterial-ui

Is it possible to utilize dynamic imports in conjunction with a for loop in Next.js?

I often use dynamic import to bring in multiple components efficiently. Is it feasible to use a 'for' loop for this purpose? import dynamic from "next/dynamic"; let Dynamic = []; for (let i = 1; i < 80; i++) { const DynamicComponent = d ...

javascriptreactjsnext.js

Encountering a 500 error when making API requests after deploying Next.js on Vercel, although they work fine

I recently deployed my Next.js app to Vercel, and I'm experiencing issues with my API calls returning a 500 status code, even though they work perfectly fine on localhost. The initial load using getStaticProps seems to be working, so I suspect the con ...

javascriptreactjsnext.jsvercel

Reordering sections in a dynamic manner

I'm working on a single-page website with four sections arranged like this: <section id=“4”> <section id=“3”> <section id=“2”> <section id=“1”> Now, I want to change the order of these sections when scrolling ...

javascriptjqueryhtml

Sending data to a child component through an onClick event handler

Can someone help me figure out how to make the Overlay inside the InviteButton visible when clicking on it? I want to use the prop show={true}, but I'm struggling with this implementation. Any assistance or guidance would be greatly appreciated. ----f ...

javascriptreactjs

Exploring Attachments in ASP.NET Core MVC Views

I have placed attachments in a Shared Folder on a server. I attempted to access them using the <a> tag <a href="file:///C:">Open Attachments</a> Unfortunately, this method did not work in ASP.NET Core MVC for unknown reasons. I ...

javascripthtmlasp.net-core

Encountering issues when implementing react-router with the client-side library

After following the author's suggestion, I've successfully loaded the client-side library. The recommended method is to simply drop a <script> tag in your page and use the UMD/global build hosted on cdnjs. I have ensured that ReactRouter i ...

javascriptreactjsreact-router

Comparison between using jQuery to append and execute a <script> tag versus using vanilla JavaScript

As I enhance my application, I've made the decision to embrace Bootstrap 5, which no longer relies on jQuery. Consequently, I am working to eliminate this dependency from my application entirely. One of the changes I'm making is rewriting the Ja ...

javascripthtmljquerybootstrap-5

Dynamic styling with jQuery input focus animation

Whenever I interact with the input field, I want my border colors to animate in and fade out smoothly. But I'm facing some challenges. Here is how I've set it up: HTML <input type="text" id="search-input" placeholder=&quo ...

jquerycss

Heroku's Express server encountered a 503 error, stating that the service is currently unavailable

I set up a server on heroku without a database, and all the GET requests are working fine. However, when I try to make a POST request from a different heroku domain, I am receiving an error: 503 "service unavailable". Has anyone encountered this issue befo ...

node.jsreactjsexpressherokuaxios

Unable to use the same hexadecimal HTML entity in the value props of a React JSX component

Can someone explain why this code snippet displays dots as password and the other displays plain hexadecimal codes? <Field label="Password" value="&#x2022;&#x2022;&#x2022;&#x2022;&#x2022;" type="password" /> While this one disp ...

javascripthtmlreactjsjsxflowtype

JavaScript: Developing an interactive Word Guessing Game

Here's some sample code: let ccdisplay = document.querySelector('.crrDisplay'); let incdisplay = document.querySelector('.incDisplay'); let guess = document.querySelector('#character'); let textForm = document.q ...

javascripthtmlloops

How can I dynamically update a React/Next.js page as the server completes different stages of a complex action?

Currently, my aim is to develop a single-page application that relies on one major back-end process. This procedure is initiated by a singular string input. The various stages involved and the outcomes are as follows: It takes about 20ms to display/render ...

javascriptreactjsnext.jsserver-action

What is the solution to rectifying the issue with graphql codegen?

Upon running the command "yarn graphql-codegen," an error occurred and I am unsure how to resolve it: % yarn graphql-codegen yarn run v1.22.4 warning package.json: No license field $ /Users/xxx/node_modules/.bin/graphql-codegen ✔ Parse Configuration ⚠ ...

javascriptreactjsnpmnext.js

the neighboring div sliding to the left causing the div not to expand with its content

I am trying to create a website similar to this one. When I click on the arrow, the left div collapses and the right one expands. However, the content of the right div does not expand as expected! Below is my HTML code: <div class="tools-bg"> & ...

jqueryhtmlcss