Email about vulnerability in WordPress arrived from my hosting provider

Hm, if the core files were edited, then there’s probably some malware elsewhere.

Remain calm and carefully follow this guide. When you’re done, you may want to implement some (if not all) of the recommended security measures.

I have received some sort of email like this too.
My hosting provider is Vimexx.
However upon checking both files, I didn’t see anything really suspicious.
The think is now what … What steps do I take (already read both links suggested by James Huff)? Is it a false alarm ?

I’d never call any security concern a false alarm on first glance, it’s just not worth it.

Run through the whole guide linked to earlier. If you still get the warning, only then would I be comfortable calling it a false alarm.

Thanks for your answers!
And I’m sorry that there was my mistake.
I have two hosting account, and I updated WordPress from version 4.4.1 to 4.4.2 at the last week on the one of my site.
But the alarm email was arrived for another site of mine. I had not updated to version 4.4.1 on the site. I have updated it for now.
Silly me!

Ah, that would explain it. ??