No required right warnings about wiki syntax in the context macro's source parameter

Steps to reproduce:

As a user without script right, create a page with content:

{{context source="string:{{velocity~}~}Evil{{/velocity~}~}"}}{{/context}}

As an admin user, edit the page.

Expected result:

There is a warning about the "Evil" script.

Actual result:

There is no warning and after saving or after inserting a macro in the WYSIWYG editor, the "Evil" script is executed.