Laravel Backpack CRUD: OS command injection in Stats::makeCurlRequest via attacker-controlled Host header (pre-auth)

Summary Backpack\CRUD\Stats::makeCurlRequest builds a shell command using unescaped input that originates from the HTTP Host header, then passes it to exec. A specially crafted Host header can break out of the shell argument and cause the server to execute arbitrary OS commands as the web user. T...