It does not appear malicious just “advertising” and annoying how it got there. Here’s the content:
[ redacted ]
Anyone else get this?
]]>found 2 files on all my wordpress sites
That means your site is compromised. Please remain calm and give this a good read.
https://codex.www.ads-software.com/FAQ_My_site_was_hacked
When you have successfully deloused your site then consider giving this a read too.
https://codex.www.ads-software.com/Hardening_WordPress
Edit: I’ve also removed the advertising for whoever hacked your site. Why give miscreants air time?
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