A major revision update has been released for WordPress (v5.6) but I am holding off on updating the blog network for a week. With major revision updates often come surprise problems that get fixed fairly quickly. v5.5.x that we are running is stable and secure, so I will likely wait for v5.6.1 to update.
Plugins
better-search-replace
content-views-query-and-display-post-page v2.3.4
kadence-blocks
qubely v1.6.2
really-simple-ssl v4.0.5
very-simple-event-list
weaver-xtreme v4.4.1
wordfence v7.4.14
Themes
twentyten v3.2
twentyeleven v3.6
twentytwelve v3.3
twentythirteen v3.2
twentyfourteen v3.0
twentyfifteen v2.8
twentysixteen v2.3
twentytwenty v1.6