Thread:Project:Support desk/Massive spam & vandalism. more than 150.000users!/reply (14)

I am not sure that using a backup will help you: If you have security issues, which are being exploited, in your code, these won't be fixed by installing a backup. Even when you directly update the outdated source code from the backup with new code again, you will still have to find the place of the security breach and fix it.