Unknow Privileged Users in Database ?

[jonaus]

Dear all,
Today i checked my database, there was some unknow Privileged Users in my database ? Could you please help me to prevent it ? I thought hacker did that, i'm not sure.
Thank you so much.
Jon

[ozzy47]

Not quite sure what you mean, can you explain a bit more.

[ForceHSS]

If there is a user group you did not make and if no one is in the group just delete it if you did not make it but if you have other admins make a post in your admin section and ask who did make it first

[jonaus]

Sorry for my bad EL. I mean my new database , i created only 1 user admin in MySQL. After 7 days, i don't know why it appeared 2 more users in that database.
@ForceHSS: my forum still not launch, so only 1 admin is me. My forum is total new. Is it hack ?