WordPress 2.5 Cookie Forging Explained
...login to WordPress with your username and password, and then the login page issues you a cookie such as the one below
Set-Cookie: wordpress 52440d615a927011d57374216b3ff789= admin%7C1209329209%7C7d5e9e67d8f74a2b657b2e63437a1241; path=/blog
As expected, the cookie contains the username, expiration in epoch time, and an MD5 hash (the %7Cs are...
