The Danger of Inline Scripts Cross-Site Scripting (XSS) remains one of the most critical vulnerabilities in modern web applications. If an attacker manages to inject a malicious script into your B2B SaaS platform—perhaps through an unescaped comment forum or a compromised third-party NPM package—they can hijack user sessions, steal HttpOnly cookies, and deface your application. React automatically escapes text output, which provides baseline protection. However, if you rely on third-party analytics, marketing scripts, or dangerously set inner HTML, your Next.js application is still vulnerable. To build an impenetrable frontend at Smart Tech Devs, we must implement a Strict Content Security Policy (CSP) with Nonces . What is a Strict CSP? A Content Security Policy is an HTTP header sent by your server that tells the browser exactly which scripts, images, and styles are allowed to execute.…