Advisories for Npm/Hfs package

When adding a "web link" to the HFS virtual filesystem, the frontend opens it with target="_blank" but without the rel="noopener noreferrer" attribute. This allows the opened page to use the window.opener property to change the location of the original HFS tab.

rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by remote authenticated users (if they have Upload permissions). This occurs because a shell is used to execute df (i.e., with execSync instead of spawnSync in child_process in Node.js).