2021 October 21
Updated Discourse to 2.8.0.beta7 with the one-click update from the
administration dashboard. Here are the release notes for this
version:
https://meta.discourse.org/t/2-8-0-beta7-security-release-fast-edits-topic-bookmarks-and-more/206578/3
Updated the Spoiler Alert plug-in to the current version. I don't
know where the release notes are or what changed, but this is an
official plug-in and they say it should be updated.