Efw Framework

How command injection happens in Java ProcessBuilder and how to fix it

The `efw` framework exposes OS command execution to application code through `CmdManager.execute(String[] params)`, which passed its parameter array straight into `new ProcessBuilder(...)` at `CmdManager.java:25` with no validation and no documented trust boundary. Because `params` is commonly assembled in event JavaScript from HTTP request parameters — often via string concatenation — the call site was a ready-made command and argument injection primitive. The fix adds explicit parameter valida