Preventing cross-site scripting attacks with the help of dynamic pre elements

An expert recommended that the user content, replyContent, be surrounded by a <pre> tag to prevent XSS attacks. However, why is it commonly believed that this code effectively prevents XSS?

I attempted to inject

</pre><script>alert("XSS");</script><pre>
, but my efforts were futile as the code successfully blocked the attack and displayed the fragment as is.

Therefore, is the current protection in place (which removes special characters like <,>,/,',& etc) adequate, or is there a way to bypass this safeguard?

Does anyone have any insights?

Snippet of Code:

$row = $("<tr class='wp_replies_tr'></tr>"); 
...  
$msgColumn5 = $("<td width='112' class='wp_msgCol5'></td>");
$preTag = $("<pre class='wp_reply_content'></pre>");
$pre.text( replyContent );
$msgColumn5.html($pre);
$row.append($msgColumn5);

Answer №1

$pre.text(replyContent); transforms the content into HTML, which helps to prevent injections (documentation). Using $msgColumn5.html($pre); allows for insertion of the already sanitized $pre element.

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

Error: The connection to Node/Postgresql was refused at 127.0.0.1:5432. This occurred after connecting at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16)

After running a Node server connecting to a Postgresql DB (via Knex) without issues, my laptop crashed. Upon restart, the DB connection stopped working, showing this error message: Error: connect ECONNREFUSED 127.0.0.1:5432 at TCPConnectWrap.afterConnect ...

The Forward and Back Buttons respond based on the current position of the caret

Exploring the concept of a Keypad-Login. I am trying to create Back and Forward buttons. However, the back and forward buttons are currently inserting the letters at the end of the input value instead of at the caret position. The input field is disabled, ...

Tips for centering or aligning a component to the right using Material UI?

Is there an efficient method to align my button to the right of its parent in Material UI? One approach could be using: <Grid container justify="flex-end"> However, this would also require implementing another <Grid item />, which m ...

Place content following a three.js display created within a <div id="mainWindow">

Recently, I created a small Three.js animation and embedded it in my HTML page like this: <div id="mainWindow" class="popup_block"> <!-- JavaScript for simulation --> <script src="../temp/webgl-debug.js"></script> <scri ...

How do I adjust brightness and contrast filters on a base64 URL?

When presented with an image in base64 format like this: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABDAAwfqNRk/rjcYX+PxrV/wtWqwJSTlboMgAAAABJRU5ErkJggg== What is the most efficient method to programmatically alter a filter (such as brightness or cont ...

Adding a Sequence of Class Names to <li> Elements with JavaScript

How can you easily generate sequential class names in a for loop? ...

Sending an object over to a different page

Need some assistance with displaying JSON data that is being repeated using ng-repeat. { "title": "image title", "description": "Lorem ipsum dolor sit amet, per ea ferri platonem voluptaria, ea eum ubique ornatus interpretaris. Dolore erroribus reprimique ...

Changing text inside ion-header-bar directive

When utilizing the ion-header-bar directive, I have the left side designated as class="button", the middle section containing <h1> with the word "Recent", and the right side as <ng-icon>. The text on the left side is dynamically generated usin ...

Can the name of the ngx-datatable-column be altered?

I recently started developing an angular2 web application that includes a ngx-datatable component. The header columns all have numeric names, but I would like to customize them in the view. Despite my efforts to research this issue, I haven't come ac ...

Postpone the appearance of a pop-up message, make it show up only once

Is it feasible to create a pop up that appears after 4 seconds and stays visible until the user interacts with the mouse? The pop up should not appear if the user scrolls before it shows. You can refer to the image for more details on the pop up box :) &l ...

What is the reason behind decorators needing to utilize apply(this) on a function?

I've been delving into the realm of JavaScript and exploring decorator code. One thing I've noticed is that when looking at decorator code like the example below, the input function always applies to 'this' even though it doesn't a ...

The absence of the function crypto.createPrivateKey is causing issues in a next.js application

For my next.js application, I am utilizing the createPrivateKey function from the crypto module in node.js. However, I encountered an issue as discussed in this thread: TypeError: crypto.createPrivateKey is not a function. It seems that this function was a ...

"Integrating JavaScript in C# Code Behind: A Step-by-Step Guide

Is there a way to trigger this javascript function using C# code in the backend when the page loads? Your assistance is greatly appreciated, thank you. <script type="text/javascript"> document.onkeydown = function (event) { event = ( ...

The received URL from the POST request in React is now being opened

After completing an API call, I successfully received the correct response in my console. Is there a way to redirect my React app from the local host to the URL provided (in this case, the one labeled GatewayUrl under data)? Any assistance would be greatly ...

Tips on obtaining the element's ID as a function parameter

I am currently learning front-end development and I am just starting to delve into JavaScript. Recently, when I tried to execute a piece of JavaScript code from the backend by passing some element ids, I encountered an error that says Cannot read property ...

Limit the text input area in HTML to a fixed size, preventing any text from exceeding the specified boundary

Is there a way to create a fixed line text area that limits the user from typing beyond a certain number of lines and maximum width? My current CSS styling for this is as follows: .area-style { resize: none; width: 324px; height: 200px; m ...

What are the steps to executing commands with child processes in Node.js?

I have successfully established communication between the client and server using socket.io. I am now utilizing WebSockets to send commands from the client to the server, and I would like to execute these received commands on the server. Here is my approa ...

Having difficulty invoking a JavaScript function at a global level

Currently, I am working on a nodejs application that involves mongoDB integration. In my code, I have created a function to extract specific data from MongoDB and save it in a variable called "docs". Despite multiple attempts to declare the function global ...

Vite/React/Express is restricting access to fetch due to the CORS policy

Currently, I'm utilizing Vite alongside React/Express for my application. The app initiated with npm run dev and is accessible at http://localhost:5173, while the backend operates on http://localhost:5000 during this phase. However, every time I attem ...

Crafting LayerGroups on the Fly with Leaflet

Dynamic Creation of LayerGroups: Is it Achievable? I am currently working on a web map showcasing the various tree species present in parks. My goal is to create a separate LayerGroup for each species so that users can toggle visibility using a LayerContro ...