[knightjs] Path Traversal allows to read content of arbitrary files

I would like to report Path Travelsal in Knightjs It allows attacker to read content of arbitary file on remote server.

            fs.readFile(pathname, (err, data) => {
                if (err) {
                    res.statusCode = 500
                    res.end(`Error getting the file: ${err}.`)
                } else {
                    res.statusCode = 200
                    // based on the URL path, …