Big Issue on multiple WP websites

I suspect the site have been hacked.

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.

It’s certainly possible that this is a hack but I’m not sure. Are these Multi site networked sites?

Are there additional warnings that follow the code you have already posted? If it’s not a multisite installation, you might give us a URL to look at or a list of the warnings.

Hi Guys, but mostly happens after the update to 4.1.1 WP version. On 10 websites 7 suffers form the same issue and the newest 3 not…

Maybe something wrong with plugins???

I’m trying to restore from cloud backup…

I’m happy to help. Did you read my questions? ??

Hi wslade, I have 10 webiste from different customers on the same hosting. There are all different WP templates. No network from site to another. It’s a very strange situation… I restore everything to a older position before the new update and now seems everything was fine…
What do you think about it?

I think you have a php error. As I asked earlier are there additional warnings after the text above? If there are (or were) additional warning, post them.

If there are no additional warnings in the header or footer, look at the error log. This information will tell me what file has the problem. I’m guessing wp-config.php but your information will tell.

Is this one of your sites?

https://byluinel.com/

Yeah sure… now it’s restored so it works…

https://www.deliriumhouse.com
https://www.cristiancarrara.com
etc etc

I am facing the same issue on my sites too. I have no clue why its happening!!

i have the same problem, all my sites in bluehost with this problem, and in diferent versions of wordpress.

Hi Guys, my issue is solved with installing a previous version of the website. I think that everything started with the server update for WP 4.1.1

Solved using an outdated version doesn’t sound like a permanent solution to me.

My solution

1 make a backup – files and mysql

2 delete all files

3 delete mysql

4 reinstall wordpress and plugins in same versions of the backup

5 restore mysql

6 restore them files

7 restores themes/uploads

With this i have the last version of wordpress same content and no errors

i think its a “virus/hack” cause all sites in my host have the same problem, and i didnt uptdate wordpress in last week

Hi,

We had the same issue.
In our case, both the theme footer.php and theme index.php were hacked.
I have tracked down the code and can upload it if necessary.

No, please do not post hacked code on these forums – it’s not useful. If you “need” to share it, you can post to a pastebin.

https://pastebin.com/

In fact, I’ve now removed the hacked code from the OP in this thread.