GeoServer through 2.18.5 and 2.19.x through 2.19.2 allows SSRF via the option for setting a proxy host.Referenceshttps://github.com/geoserver/geoserver/releaseshttps://osgeo-org.atlassian.net/browse/GEOS-10229https://github.com/geoserver/geoserver/compare/2.19.2...2.19.3https://osgeo-org.atlassian.net/browse/GEOS-10229?focusedCommentId=83508
