When starting Apache Solr versions prior to 8.8.2, configured with the SaslZkACLProvider or VMParamsAllAndReadonlyDigestZkACLProvider and no existing security.json znode, if the optional read-only user is configured then Solr would not treat that node as a sensitive path and would allow it to be readable. Additionally, with any ZkACLProvider, if the security.json is already present, Solr will not automatically update the ACLs.
When starting Apache Solr versions prior to 8.8.2, configured with the SaslZkACLProvider or VMParamsAllAndReadonlyDigestZkACLProvider and no existing security.json znode, if the optional read-only user is configured then Solr would not treat that node as a sensitive path and would allow it to be readable. Additionally, with any ZkACLProvider, if the security.json is already present, Solr will not automatically update the ACLs.
https://www.openwall.com/lists/oss-security/2021/04/12/3 https://issues.apache.org/jira/browse/SOLR-15249 https://github.com/apache/lucene-solr/commit/90671d8072bd09d4acaee0c390a53984b7474ebe https://github.com/apache/lucene-solr/commit/d97d1a07024edabb8dcd9ccf40f9ba31209c36ab
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