GeoNetwork is a catalog application to manage spatially referenced resources. From 4.0.0-alpha.1 until 4.2.16 and 4.4.11, the Elasticsearch-backed search proxy can skip GeoNetwork's access-control filter injection when a client request has an omitted query field. The request is then forwarded to Elasticsearch without group visibility, draft exclusion, record ownership, or portal-specific filtering. An unauthenticated remote attacker can use the affected public search API to retrieve the full indexed contents of metadata records that should not be publicly visible. This issue is fixed in versions 4.2.16 and 4.4.11.
https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-582q-v28r-7cxr
https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.11
https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.16
https://github.com/geonetwork/core-geonetwork/commit/6c756c63cd1fa942f3832d99c64380c69c5e8be9
https://github.com/geonetwork/core-geonetwork/commit/1916412d38999f2eff68bad2dfccd69340d20f3f