Next.js Profile
Find out how the presence of Next.js is fingerprinted, associated security risks, and recommended configurations.
What is Next.js?
Next.js is an open-source web development framework created by Vercel enabling React-based web applications with server-side rendering and static website generation.
Security and Vulnerability Footprint
Next.js includes robust default security parameters. However, misconfigured environment variables (e.g. exposing private keys in NEXT_PUBLIC_) or server-side request forgery (SSRF) within getStaticProps/getServerSideProps present severe exposure points.
Defensive Best Practices
Add the poweredByHeader: false configuration inside next.config.js to strip the X-Powered-By header. Ensure private secrets are never prefixed with NEXT_PUBLIC_ to prevent bundling into client-side build files.
Frequently Asked Questions
How is Next.js detected on a website?
Next.js websites are detected via the '__NEXT_DATA__' script block, specific bundle paths matching '/_next/static/', and the presence of the 'X-Powered-By: Next.js' header.
How can I hide the Next.js powered-by header?
You can disable it by adding 'poweredByHeader: false' to your 'next.config.js' file.
Is Next.js safe from SSRF attacks?
Next.js itself is secure, but custom server-side data-fetching methods that accept unsanitized user inputs can leak access to internal networks (SSRF).