Strange mysql users

[EduardoG]

Hi all, I'm a little bit worried about this. I've discovered three mysql users created at mysql with names like bug115166_XXXXX (where X are digits)
This is a simple plesk9 installation over a redhat machine.

Is this something about psa updates? is there a bug? is it a hack?

 

[IgorG]

I have checked my Plesk 9 test environment with all updates and not found such users in mysql database. Looks like it is not related to Plesk.

 

[EduardoG]

Thanks, IgorG, gonna delete them right now

 

[IgorG]

Be careful. Create dump of database before deletion just in case.

 

[EduardoG]

Sure! my first command was a mysqldump ;-)
But thanks for your advice

P.S. I've grep'ed everywhere for those usernames and found nothing. Strange...