CVE-2017-7660

CVE-2017-7660 is a high-severity vulnerability affecting Apache Solr, specifically when PKI-based inter-node communication is enabled and certain authentication plugins are used. An attacker can craft a malicious node name to trick legitimate cluster members into accepting an unauthorized node, potentially leading to unauthorized data modification (integrity impact). The attack is network-based and low complexity, but there is no evidence of active exploitation, public exploit code, or significant community discussion.