any Javascript exploits noted?

Recently using Libre Office 6.4.7 I noted some odd document names in the “Recent Documents” list. Random letters, numbers, etc. Also, the URLs included a tag for “[remote]” along with https//:
I queried a couple of anti-virus references without resolution. Some days thereafter I was running a full scan of my system when it produced a Javascript Exploit notice, and recommended immediate action.
Libre Office is the only program I use that had any sort of strange behavior (the document names NOT created by me) that I know of.
So, I was wondering whether this sounded like something anyone else has seen.
Thanks.

Random letters, numbers, etc. Also, the URLs included a tag for “[remote]” along with https//:

You seem to use something like OneDrive, Google Drive, some other cloud service - right? And generally: If you are using Writer only and no additional extension installed, Java is not used by LibreOffice.