{"id":"CVE-2021-27905","aliases":["BIT-solr-2021-27905","DEBIAN-CVE-2021-27905","EUVD-2021-0959","GHSA-5phw-3jrp-3vj8","UBUNTU-CVE-2021-27905"],"status":"published","title":"SSRF vulnerability with the Replication handler","description":"The ReplicationHandler (normally registered at \"/replication\" under a Solr core) in Apache Solr has a \"masterUrl\" (also \"leaderUrl\" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the \"shards\" parameter. Prior to this bug getting fixed, it did not. 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