CVE-2025-29927 PoC — Authorization Bypass in Next.js Middleware

Source

https://github.com/Gokul-Krishnan-V-R/cve-2025-29927

Associated Vulnerability

Title:Authorization Bypass in Next.js Middleware (CVE-2025-29927)
Description:Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.

Description

Next.js and the corrupt middleware...TRY TO HACK IT..!

File Snapshot


 [4.0K]  /data/pocs/26e79378e962c193b2a416a791e3cf65103efdef
├── [ 393]  eslint.config.mjs
├── [  92]  next.config.js
├── [ 133]  next.config.ts
├── [ 201]  next-env.d.ts
├── [ 615]  package.json
├── [193K]  package-lock.json
├── [  82]  postcss.config.js
├── [  81]  postcss.config.mjs
├── [4.0K]  public
│   ├── [ 391]  file.svg
│   ├── [1.0K]  globe.svg
│   ├── [1.3K]  next.svg
│   ├── [ 128]  vercel.svg
│   └── [ 385]  window.svg
├── [1.6K]  Readme.md
├── [4.0K]  src
│   ├── [4.0K]  app
│   │   ├── [4.0K]  dashboard
│   │   │   └── [2.4K]  page.tsx
│   │   ├── [ 25K]  favicon.ico
│   │   ├── [ 574]  globals.css
│   │   ├── [ 475]  layout.tsx
│   │   ├── [4.0K]  login
│   │   │   └── [3.0K]  page.tsx
│   │   └── [1.4K]  page.tsx
│   └── [ 768]  middleware.ts
├── [ 507]  tailwind.config.ts
└── [ 599]  tsconfig.json

5 directories, 23 files

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