It used to be at https://www.freebsd.org/security/advisories.rdf, but that now 404s, and I can't find a newer syndication URL in the source for https://www.freebsd.org/security/advisories/.
(In reply to PauAmma from comment #0) I was told the feed is now at https://www.freebsd.org/security/feed.xml, but I still think that URL should be in the <head> metadata for https://www.freebsd.org/security/advisories/ for feed autodiscovery by aggregators.
For completeness: since the feed itself uses Atom, autodiscovery requires the page (https://www.freebsd.org/security/advisories/) to have the following in somewhere within <head>...</head>: <link rel="alternate" type="application/atom+xml" title="FreeBSD security advisories" href="https://www.freebsd.org/security/feed.xml" /> Adjust title= for preferences, editorial policy, and or whatever else is relevant.
Created attachment 230519 [details] Add ID for CH341K
(In reply to Daniel O'Connor from comment #3) Just so you don't wonder why no one is paying attention, I think you attached this to the wrong bug.
(In reply to PauAmma from comment #4) Oops sorry, thanks for letting me know!
Happy to help with this if still current.
(In reply to Pierre from comment #6) Thanks. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260747#c2 gives the gist of what to do. Let me know if you need specifics and I'll try either to find them for you or to point you at something or someone.
(In reply to PauAmma from comment #7) Noted. Could you please share the location of the git repo where these files live?
(In reply to Pierre from comment #8) https://git.freebsd.org/doc.git (cloning) or https://cgit.freebsd.org/doc/tree/ (web browsing). website/themes/beastie/layouts/partials/site-head.html is probably what goes inside <head>...</head>, but it looks shared between several pages or groups of pages, so you'd need to check the feed URL is properly parameterized and you don't break other uses. (Note: I haven't tried autodiscovery of other RSS feeds, so I can't rule out they're broken too and need their own fixes.
Created attachment 243425 [details] site-head.html patch for rss feed url
(In reply to John Darrah from comment #10) After applying this patch and regenerating the website files: % grep -rFl security/feed.xml website/public/ | wc -l 1909 So obviously, the solution I suggested doesn't work. (I mentioned in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260747#c9 it might not, but I wasn't expecting it to wind up in that many files. *grimace*) Back to the drawing board.