Avast warned about JS: Injection

[REDACTED]

Hello,
new here. Searched for a sollution, found some that almost solved it for me but only almost.
I got a warning:
Infektion: JS:Injection-A [Trj]
URL: http://xxx.se/blog/  (I changed the actual url in case the owner himself want to deal with the problem)
Process:/System/Library/Staged/ ... /MacOS/com.apple.WebKit.Networking

I would of course prefer not to get this warning again.
•What do I do? Can I throw away/delete the file (com.apple.WebKit.Networking)? I haven't been to this site for at least a year.
•What can the owner of the site do?

Thanks in Advance  // BosseK

[Asyn]

I changed the actual url in case the owner himself want to deal with the problem

Without the real URL, we can't help you.

[REDACTED]

Ok, I was hoping it was possible but here it is:
http://palmklint.se/blog/

(Avast gives a warning when I try to enter)

[Asyn]

-> https://sitecheck.sucuri.net/results/palmklint.se/blog/

[Eddy]

http://retire.insecurity.today/#!/scan/5ffc1d40f1a081e6cd8e41344379afd85217650d9054126f9e6940248c9d9666

https://blog.sucuri.net/2015/11/jquery-min-php-malware-affects-thousands-of-websites.html

[REDACTED]

Thank you for your answers. I will pass them on to the blog-owner.

But I don´t understand why Avast keeps alerting me even though I haven´t been to that blog for ages. Anything I can or should do on my computer?

[Asyn]

1. Thank you for your answers. I will pass them on to the blog-owner.
2. But I don´t understand why Avast keeps alerting me even though I haven´t been to that blog for ages. Anything I can or should do on my computer?

1. You're welcome.
2. See if it helps to clean your browser cache, else wait for one of the Mac guys.