I was going through a web application from my account and I was able to view some confidential information about my other account. I want to know if this is a case of missing function level access control or privilege escalation. 

Say my URL is: `www.example.com/user1/info/1` This URL contains my profile information. Now, I change this URL to `www.example.com/user1/info/2` This gives info about the profile of another user which should not be accessible to me.