In this tutorial we will see how to create middleware for xss protection in laravel 8. Cross-site scripting is a type of security vulnerability that can be found in some web applications. XSS attacks enable attackers to inject client-side scripts into web pages viewed by other users.

    In laravel 8 we are use middleware for prevent xss attack on website security. It's very necessory protection from xss attack or any other cyber attack on website.

    The XSS filter through we can remove the HTML tag from our input value and also it's very important to remove html tag for the security. Input sanitization is a security protocol for checking, filtering, and cleaning data inputs from app users.

What are the types of XSS attacks?

    There are three main types of XSS attacks. These are:

• Reflected XSS, where the malicious script comes from the current HTTP request.
• Stored XSS, where the malicious script comes from the website's database.
• DOM-based XSS, where the vulnerability exists in client-side code rather than server-side code.

    So, let's see how to create middleware for xss protection in laravel 8.

    In this step, We have to create custom middleware for xss prevention in laravel. So, copy below command and run on terminal.

php artisan make:middleware XSS

    Now, register middleware in app/http/kernel.php path.

class Kernel extends HttpKernel
{
    protected $routeMiddleware = [
        'XSS' => \App\Http\Middleware\XSS::class,
    ];
}

    In this step, we can see new file in app/Http/Middleware/XSS.php and then just put the bellow code in our XSS.php file. You can directly use strip_tags() in any input filed of save data in controller.

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class XSS
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        $input = $request->all();
        array_walk_recursive($input, function(&$input) {
            $input = strip_tags($input);
        });
        $request->merge($input);
        return $next($request);
    }
}

    Now, we are use XSS middleware in our routes.php file

    routes/web.php

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Middleware\XSS;
use App\Http\Controllers\UserController;

Route::group(['middleware' => ['XSS']], function () {
    Route::get('xss_prevention', [UserController::class,'xssPrevention']);
    Route::post('xss_prevention_data_store', [UserController::class,'xssPreventionStore'])->name('xssPreventionStore');
});

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