Very Serious Security Problem

Very Serious Security Problem

When you log out of zoho from a computer and someone uses the same computer and logs into zoho you are still logged in and they have your account and access priviledges.  This is a very serious problem and no one at Zoho has acknowledged this.  Has anyone else experienced this?
 
1. As soon as you log out of Zoho and close the browser
2. Open a new browser and go to zoho.com
3. Have another user log in
4. You will see on the top right that the previous user is still logged in
5. If the previous user was an admin you will see the second user can have free access
 
Prior to writing this note I logged out and without logging back in I was able to send this as if I was logged in.
 
Please fix this problem.