Is it possible to share a cookie between a domain and a subsubdomain

Question

I'm trying to share a cookie between www.example.com and admin.other.example.com I've being able to make it work with other.example.com, but there's no way to access the sub-sub-domain

Edit: I handle subdomains by defining the cookie domain as .example.com (note the first dot)

Answer 1

You can only share cookies between a domain and its own subdomains. For example:

• a cookie defined for the domain example.com can be accessed by www.example.com and foo.bar.example.com
• a cookie defined for the domain www.example.com can be accessed by foo.www.example.com but not by bar.example.com