

Read-only, or the ability to edit filenames & upload files?
Read only: as per other answers here, basically any HTTP server. The easiest one I know would be darkhttpd, because it requires no config files and can be run without root.
Read write: I like WFM https://github.com/tenox7/wfm





Bogus CVE. Spam.
From the PoC:
If you replace parts of a program with malware then you can get malware to run. This is true of all software.