A security flaw has been found in the source version of Vim. Be sure you keep VimR up-to-date with the latest version. Details are provided in the report linked below:
"If you haven’t patched Vim or NeoVim text editors, you really, really should
Sandbox escape in the ancient text editors lets attackers get a reverse shell."
https://arstechnica.com/information-technology/2019/06/if-you-havent-patched-vim-or-neovim-text-editors-you-really-really-should/