The term CMS has been used to mean configuration management system for longer than it has been used to mean content management system. One can find articles from 1990 using it in the former context, while the latter appears to have been used since the late 1990s.
If so, that's a really awful re-use of a TLA (three letter acronym)
Many people still refer to any website that is editable as a CMS - Content Management Systems.
so please don't call it that, it will only sow confusion