?vn html files in the Google Search Console, what are they?

Hello Guys,

I found 743 non-idexed pages next to my 54 indexed pages in Search Console and I don't know what are these URLs. Have you ever seen them? They are not physically in the root folder:

/page/4/?vn/2022-12-125413_html
/what-smell-do-drain-flies-hate/?vn/2022-12-10536911.html
/drain-fly-life-cycle/?vn/2022-12-1220767.html
/what-is-the-difference-between-a-fruit-fly-and-a-drain-fly/?vn/2022-12-2326363.html
/page/2/?vn/2022-12-1223735_html
/are-drain-flies-harmful-to-cats/?vn/2022-12-1550372.html

They show the original page but because of the ?parameter, Google throws errors.

agostino2023 said:

They show the original page but because of the ?parameter, Google throws errors.

Click to expand...

This may be indicative of a hack, it may not. What do you get if you visit those pages with a Google.com http referer? Some hacks will only show up if the user has clicked from a SERP, and spoofing the http referer is one way to trigger this.

If the content is the same either way, just make sure proper canonicals are set on those urls and this shouldn't be an issue. Bots and the like add all sorts of parameters to urls, arbitrarily scanning for pages that aren't there, or default installation paths.