NextJS_CVE-2025-29927

Next.js Authorization Bypass Demo This application demonstrates the x-middleware-subrequest vulnerability in Next.js 13.4.19, which allows bypassing middleware protection. Setup 1. Install dependencies: root@kitploit: npm install 2. Start the development server: root@kitploit: npm run dev...

CVE-2025-29927

CVE-2025-29927 Next.js Middleware Authorization Bypass The detection template for CVE-2025-29927 is now officially part of the Nuclei Templates repository. https://github.com/projectdiscovery/nuclei-templates/blob/main/headless/cves/2025/CVE-2025-29927-HEADLESS.yaml A critical vulnerability in...

CVE-2025-29927

CVE-2025-29927 - Next.js Middleware 15.2.2 - Authorization Bypass ⚠️ Critical Authentication Bypass in NextJS Middleware 🛠️ PoC implementation by @zs1n 💡 Overview NextJS is a popular React-based web framework, has an authentication vulnerability that affects versions prior to 12.3.5, 13.5.9,...

cve-2025-29927

cve-2025-29927 CVE-2025-29927 is a critical vulnerability in Next.js, a popular React-based web framework. The flaw exists in how the middleware feature handles certain internal headers — specifically, the x-middleware-subrequest header...

next-attack

This is a Next.js project bootstrapped with create-next-app. Testing the vulnerability First, you can confirm that the middleware works and should redirect the user: root@kitploit: curl http://localhost:3000/api/admin Then, you can show how the middleware is being bypassed with the followign...

CVE-2025-29927

CVE-2025-29927 – Next.js Middleware Authorization Bypass This repository contains a functional exploit for CVE-2025-29927, a critical authorization bypass vulnerability in Next.js. The flaw allows attackers to bypass middleware-based authentication and authorization checks, granting unauthorized...

cve-2025-29927

CVE-2025-29927 1. go to /api/flag 2. add x-middleware-subrequest: src/middleware:src/middleware:src/middleware:src/middleware:src/middleware as header 3. see response...

cve-2025-29927

This is a sample Next.js project bootstrapped with create-next-app for practically explaining how cve-2025-29927 works. https://nextjs.org/docs/app/api-reference/cli/create-next-app. Getting Started First, run the development server: root@kitploit: npm run dev or yarn dev or pnpm dev or bun dev...

CVE-2025-29927

CVE-2025-29927 — Next.js Middleware Authentication Bypass Overview Imagine a bouncer in front of the club, but if you tell him "I'm already in," he lets you pass without checking. That's exactly what CVE-2025-29927 is. Middleware in Next.js runs before a request is processed, making it the ideal...

CVE-2025-29927

CVE-2025-29927 — Next.js middleware authorization bypass Summary: vulnerability in Next.js middleware allowing authorization bypass by spoofing the x-middleware-subrequest header. Table of Contents CVE-2025-29927 — Next.js middleware authorization bypass Table of Contents Gathering vulnerable hos...

CVE-2025-29927__Next.js

CVE-2025-29927 - Next.js Middleware Authorization Bypass POC ⚠️ Legal Disclaimer : This tool is intended for security research, authorized penetration testing, and educational purposes only. Using this tool against target systems without explicit permission is illegal and unethical. 📋 Overview...

NextJS-Middleware-Bypass-PoC

MCID15795619: Next.js Middleware Bypass PoC Executive Summ...

Next.js 15.2.3 Middleware Bypass Scanner

A vulnerability exists in the Next.js middleware handling mechanism, where requests containing the "x-middleware-subrequest" header are processed differently compared to normal requests, potentially allowing attackers to bypass authentication. This is a scanner to test version 15.2.3...

📄 Next.js 15.2.3 Middleware Authorization Bypass

This Python script checks whether a website built with Next.js is vulnerable to CVE‑2025‑29927, a middleware authorization bypass flaw triggered by the request header:x-middleware-subrequest...

Exploit for Improper Authorization in Vercel Next.Js

PoC: CVE-2025-29927 - Next.js Middleware Bypass This reposito...

EUVD-2025-9629

Malicious code in bioql PyPI...

Exploit for CVE-2025-29927

CVE-2025-29927 CVE-2025-29927: Next.js Middleware Bypass Vulne...

Next.js may leak x-middleware-subrequest-id to external hosts

Summary In the process of remediating CVE-2025-29927, we looked at other possible exploits of Middleware. We independently verified this low severity vulnerability in parallel with two reports from independent researchers. Learn more here. Credit Thank you to Jinseo Kim kjsman and RyotaK GMO Flat...

CVE-2025-30218 Next.js may leak x-middleware-subrequest-id to external hosts

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

Vulnerability fixed in Next.js

Vercel has fixed a vulnerability in Next.js Specific to versions 14.2.25 and 15.2.3 Next.js is a popular framework for developing Web applications. The vulnerability is in the way Next.js handles authentication checks in its own middleware. This allows malicious actors to bypass these controls,...