Password protected posts have too long lifespan

[Clorith]

When creating a password protected post the access permissions are stored with cookies using wp-pass.php which defaults to 10 days.

This is too long of a lifetime for a protected page as subsequent visits within that timeframe allows anyone access to the protected content.

Ideally this should be a user definable value, either set per post, or on a global level for that WP instance.

We could also just make it a session cookie, so that it expires right after the tab (or browser?) is closed.

This is also a viable solution, I agree, and might even be a better approach as you don't need to worry about the cookie expiring while the user is using the site.

Related: #21466

#21466 is pretty similar to this and has a patch (although maybe not the best one). Let's combine forces.