Copying and pasting Status Macro (or TOC Macro) over https triggers mixed content and breaks certificate trust

Issue Summary

Copying and pasting a status macro (or TOC) over https in the browser will trigger mix content action, it will break the certificate trust on request of:

Status macro

• plugins/servlet/status-macro/placeholder?title=titlehere&colour=Yellow

TOC macro

• /plugins/servlet/confluence/placeholder/macro?definition=e3RvY30&locale=en_US&version=2

Environment

Confluence 6.14.0
Confluence 6.14.1
Confluence 6.14.2
Connector with SSL

Steps to Reproduce

1. Create a page and add a status macro (or TOC macro)
2. Open inspect tools/network tab and edit the page
3. Copy and paste the status macro

Expected Results

The status macro is pasted.

Actual Results

The requests are resolved over HTTP and certificate is not trusted because of mixed content.

Notes

The issue does not exist in 6.13.0

Workaround for NGINX

If a reverse proxy is in use such as NGINX, adding a section to the proxy configuration file to redirect HTTP to HTTPS will address the problem:

server{
	listen 80 default_server;
	listen [::]:80 default_server;
	server_name _;
	return 301 https://$host$request_uri;
}

Workaround for Apache

If a reverse proxy is in use such as Apache, adding a section to the proxy configuration file to redirect HTTP to HTTPS will address the problem:

Listen 80

<VirtualHost *:80>
    ServerName _
    RewriteEngine On
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [L,NE,R=301]
</VirtualHost>

Update (4/26)

This issue has also been reported when copying/pasting the Jira Issues macro.

Update 5/21

This issue has also been reported when copying/pasting emoticons.