The Multimedia macro supports swf files - see the example wiki markup at the very bottom to the page that refers to "ninjas.swf". The documentation I've linked to is the cloud version, which is the latest version of Confluence (6.0.3 at the time of writing).
6.03 does and doesn't support swf.
TOCs which worked in Confluence 5.8 now don't work in the Multimedia macro (have to provide a link instead and browser IE11 plays the file correctly in a new window)
Two vulnerabilities have been published for Confluence Server and Data Center recently: March 20, 2019 CVE-2019-3395 / CVE-2019-3396 April 17, 2019 CVE-2019-3398 The goal of this article is...
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