Following : https://null-byte.wonderhowto.com/how-to/easily-detect-cves-with-nmap-scripts-0181925/ is probably what you did there tutorial is awful in my opinion about nmap-vulners HOT 2 CLOSED

Following : https://null-byte.wonderhowto.com/how-to/easily-detect-cves-with-nmap-scripts-0181925/ is probably what you did there tutorial is awful in my opinion
you will run into the error "/usr/local/bin/../share/nmap/nse_main.lua:823: 'vulners' did not match a category, filename, or directory
stack traceback:
[C]: in function 'error'
/usr/local/bin/../share/nmap/nse_main.lua:823: in local 'get_chosen_scripts'
/usr/local/bin/../share/nmap/nse_main.lua:1315: in main chunk
[C]: in ?

QUITTING!"
the way I fixed this was by using the command:
cd /usr/share/nmap/scripts
nmap -sV --script=vulscan/vulscan.nse
nmap -sV --script=vulscan/vulscan.nse -sV -p22 50...** (*or what ever command you desire)

If it still isn't make sure you installed it correctly:
cd /usr/share/nmap/scripts
git clone https://github.com/scipag/vulscan scipag_vulscan
ln -s pwd/scipag_vulscan /usr/share/nmap/scripts/vulscan

Have a good day m8 cheers

Originally posted by @40withabeam in #13 (comment)

"cd /usr/share/nmap/scripts"
This only gives me cd: no such file or directory: /usr/share/nmap/scripts

from nmap-vulners.

The following got it working for me:
brew info nmap #to find Nmap installation directory

git clone https://github.com/scipag/vulscan.git vulscan #If you clone anywhere else than ~/ you must use that full path to create symlink

ln -s 'pwd'/vulscan /opt/homebrew/Cellar/nmap/7.91/ #symlink into nmap install dir

#finally the magic
nmap --script-updatedb #update the script database so you can use them

#then just
nmap -sV --script=vulscan/vulscan.nse target-host

from nmap-vulners.