How to submit post once you're logged in, but not from the admin panel?

I have a Real Estate website where members (“editor” level) can submit their property listings from the admin panel. I want them to be able to submit the property listings from a regular page, without having to go to the admin panel. They would still have to log in.

I have found a script that does something like that but it only works with “pages” and “posts” but not with “property listings”.

Is there a plug in that does that or does it have to be coded?

I can find my way around some code, but I’m definitely not an expert.