Issues resolved in 6.6.13
The Atlassian Confluence team is pleased to announce the release of Confluence 6.6.13, which is a bug-fix release.
Don't have Confluence 6.6 yet?
Check out the new features and other highlights in the Confluence 6.6 Release Notes.
We recommend you read the Confluence 6.6 Upgrade Notes and you back up your
confluence-home directory and database before upgrading.
Released on 05 April 2019
From 6.6.13 URLs must be added to Confluence's whitelist before they can be shared using the Share a link blueprint. This is to prevent people from accidentally or maliciously sharing links that may pose a security risk to your site.