I know there is a lot of session security questions but I want to know if my specific situation is secure.
In my website the users log in with the steamWebAPI and openID. It sends me $_SESSION['steamID64'].
I use this steamID64 as full authentification, for instance :
if($_SESSION['steamID64'] == [my steam id]) {
showAdminPanel();
}
Can a hacker get my session id and change it in his cookies so the website think he is me ?
Do you have some advices for me ?