How Do I/can I Access A Sessionid Cookie Through Javascript?

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, $.c

Solution 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.