This question is in reference to Atlassian Documentation: HTML Macro
I am the Admin for our site, and I went looking for this macro per the "Enabling the HTML Macro" instructions and could not find it. Is it no longer available?
For security reasons, the built-in HTML macro is not allowed to be enabled on Atlassian Cloud instances. This is a good thing because it makes your Atlassian Cloud Confluence safer.
However, that does not mean that you can't have a HTML Macro. Instead, to get a HTML Macro back you merely install an add-on from the marketplace that will provide it for you. Here is one for example: https://marketplace.atlassian.com/plugins/biz.artemissoftware.confluence.html.HtmlMacro/cloud/overview
It is not that you have to pay for it that makes it safe. The problem with the HTML Macro, as it exists in Confluence Server, is that a malicious user could inject any arbitrary HTML you like into the page and perform any action that you like. That is why we block the HTML macro in our Cloud products. This is an acceptable tradeoff for Server because many Server and Data Center customers that are heavily data privacy conscious will put their server instance in a VPN.
The Atlassian App framework uses iframes, scopes and other mechanisms to block what a 3rd party app can, and cannot, do. This significantly restricts the surface area of harm that injecting arbitrary HTML can cause. So it is the fact that these HTML macros are implemented as Atlassian Apps at all than make them more secure.
Also, our App developers could put in even more safeguards again.
In short, Apps are pretty cool and we invest in making them secure. I hope that answers the question?
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