Thanks for that clarification. So a user can submit a listing after login, so that he remains owner of the listing?
Giving 777 to any part of a WP install is a major security issue…if your host cannot achieve your goals with default WP permisions, fire them.
Agree, but I am running my own VPS.
I will take care of the permissions once I get this issue sorted.
I want to know what is missing, i.e. what can be more reasons of this problem?