how do i/can i access a sessionid cookie through javascript?

Question

I've installed the cookie extension for jquery, and am attempting to access the session id cookie.

I currently have two cookies for my session - see screenshot below:

however, $.cookie() only lists one:

> $.cookie()
Object {csrftoken: "fFrlipYaeUmWkkzLrQLwepyACzTfDXHE"}
> $.cookie('sessionid')
undefined

can i/how do i access the sessionid cookie from javascript?

Answer 1

The session id cookie should be marked as HTTP Only, preventing access from javascript. This is a security issue, preventing session hijacking via an xss vulnerability.

You can see in your screenshot that the cookie is indeed marked as HTTP.

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If you want to learn more about the flag see here. Originally implemented by IE, most browsers support the flag nowadays, and session cookies not marked http-only are considered a security flaw. Also see here.