A document disclosure flaw was found in Elasticsearch when Document or Field Level Security is used. Search queries do not properly preserve security permissions when executing certain cross-cluster search queries. This could result in the search disclosing the existence of documents the attacker should not be able to view. This could result in an attacker gaining additional insight into potentially sensitive indices.

References:

https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125

A document disclosure flaw was found in the Elasticsearch suggester and profile API when Document and Field Level Security are enabled. The suggester and profile API are normally disabled for an index when document level security is enabled on the index. Certain queries are able to enable the profiler and suggester which could lead to disclosing the existence of documents and fields the attacker should not be able to view.

References:

https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125