FYI, it looks like the “Security Advisories” landing page now forwards to GitHub (fair enough); unfortunately, the previous RSS feed doesn’t work anymore:
2021-06-02 07:37:52,210 [ERROR] HTTP status 404 fetching feed nextcloud-advisories (https://nextcloud.com/wp-content/themes/next/advisories/advisories.rss → [email redacted])
Given that quite a number of security-related RSS feeds exist, it would be a shame if Nextcloud advisories now will only become visible for those whose notification workflows are RSS-based once notifications are picked up/included in third-party feeds…