Hello Guys,

We've been noticing this problem with Solr version 5.4.1 and it's still the 
case for the version 6.6.0. The problem is that we're using SolrCloud with 
secured Zookeeper and our users are granted access to Solr Admin GUI, and, at 
the same time, they are not supposed to have access to Zookeeper credentials, 
i.e. usernames and passwords. However, we (and some of our users) have found 
out that Zookeeper credentials are displayed on at least two sections of the 
Solr Admin GUI, i.e. "Dashboard" and "Java Properties".

Having taken a look at the JavaScript code that runs behind the scenes for 
those pages, we can see that the sensitive parameters ( -DzkDigestPassword, 
-DzkDigestReadonlyPassword, -DzkDigestReadonlyUsername, -DzkDigestUsername ) 
are fetched via AJAX from the following two URL paths:

/solr/admin/info/system
/solr/admin/info/properties

Could you please consider for the future Solr releases removing the Zookeeper 
parameters mentioned above from the output of these URLs and from other URLs 
that contain this information in their output, if there are any besides the 
ones mentioned? We find that it is be pretty challenging (and probably 
impossible) to restrict users from accessing some particular paths with 
security.json mechanism, and we think that that would be beneficial for overall 
Solr security to hide Zookeeper credentials.

Thank you so much for your consideration!

Best regards,
Ivan Pekhov

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