ⓘ Extend HTTP and FTP download callbacks with destination validation while preserving legacy tracking callbacks and enforcing SSRF policy across redirects, proxies, caches, and direct/passive sockets.
https://github.com/webmin/webmin/pull/2789#discussion_r3567985773
Block non-public HTTP, HTTPS and FTP destinations by default in File Manager, Mailboxes and Upload and Download, with per-user IP/CIDR exceptions, redirect and proxy protection, cache isolation, and current-ACL enforcement for scheduled jobs.
* Note: Validate File Manager action name/file parameters as checked paths under the current directory and `allowed_paths` before operations, blocking traversal and symlink escapes.