What is this “1 issue detected” in regards to?

[Lia_]

Hello friends, I ran my website through Google Search Console and I’m seeing this message. What does this mean? Did my website get attacked with malware?

[Josh_Uebergang · Accepted solution]

So others can easily see:

Unfortunately Google hasn't provided any sample URLs which makes it very difficult to diagnose. If there's not too many pages on your site, I'd search your site in Google like: site:domain.com then look too see what page(s) from SERPs are either not there or give a warning about security.