Which CMS is best for large scale security site

I'm a font-end developer and designer and I have been tasked to find the best CMS for our cyber security company. The security of the site is very important since we sell security, but we're also looking for a CMS that will allow me to easily build templates or import templates. We also want it to provide a WYSIWYG interface for quick changes, or for marketing folks to use.

I don't feel like Wordpress is an option based on security, but let me know if that's an inaccurate assumption. I'm...

Which CMS is best for large scale security site

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