{"id":"CVE-2017-7660","aliases":["GHSA-c82r-qg3w-q5mv"],"url":"https://o3.security/vulnerability/CVE-2017-7660","summary":"Apache Solr insecure inter-node communication","details":"Apache Solr uses a PKI based mechanism to secure inter-node communication when security is enabled. It is possible to create a specially crafted node name that does not exist as part of the cluster and point it to a malicious node. This can trick the nodes in cluster to believe that the malicious node is a member of the cluster. So, if Solr users have enabled BasicAuth authentication mechanism using the BasicAuthPlugin or if the user has implemented a custom Authentication plugin, which does not implement either \"HttpClientInterceptorPlugin\" or \"HttpClientBuilderPlugin\", his/her servers are vulnerable to this attack. Users who only use SSL without basic authentication or those who use Kerberos are not affected.","published":"2017-07-07T19:29:00.197Z","modified":"2026-07-08T16:07:20.971017Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.solr:solr-core","fixedVersion":"5.5.5"},{"ecosystem":"Maven","name":"org.apache.solr:solr-core","fixedVersion":"6.6.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://mail-archives.us.apache.org/mod_mbox/www-announce/201707.mbox/%3CCAOOKt53EgrybaD%2BiSn-nBbvFdse-szhg%3DhMoDZuvUvyMme-Z%3Dg%40mail.gmail.com%3E"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/99485"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20181127-0003/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T16:07:20.971017Z"}}