HelloWeb 2.0 contains an arbitrary file download vulnerability that allows remote attackers to download system files by manipulating filepath and filename parameters. Attackers can send crafted GET requests to download.asp with directory traversal to access sensitive configuration and system files.
https://www.vulncheck.com/advisories/helloweb-arbitrary-file-download
https://www.exploit-db.com/exploits/48659
https://web.archive.org/web/20190109182037/https://helloweb.co.kr/