In this video I’m showing you a huge security risk that can be sitting inside your Laravel app without you even realizing it: Cross-Site Scripting (XSS). I walk through a very practical example using a simple dashboard where users can create posts, and I point out the blunder mistake I also did in my earlier days—rendering user input with raw output so whatever is inside a <script> tag just runs. First I demonstrate a basic exploit with an alert, and then I show a bigger exploitation where a malicious user injects JavaScript that keeps sending requests and fills your database with junk posts, and you only find out after an innocent user complains. After that, I go through three solutions. Solution 1 is the obvious one: don’t render raw HTML—use escaped output so scripts don’t execute. But if you’re allowing rich text (bold, italics, paragraphs), then you need a better approach. Solution 2 is HTML sanitization using the stevebauman/purify package, either by cleaning on output or by using model casting so you don’t have to remember it everywhere. Solution 3 is adding a Content Security Policy (CSP) header via middleware to block inline script execution and control which script sources are allowed—this is a very strong extra layer of defense.