Apache Solr is vulnerable to remote code execution vulnerabilities via the DataImportHandler, an optional but popular module to pull in data from databases and other sources. The module has a feature in which the whole DIH configuration can come from a request’s “dataConfig” parameter. The debug mode of the DIH admin screen uses this to allow convenient debugging / development of a DIH config. Since a DIH config can contain scripts, this parameter is a security risk.
View the template here CVE-2019-0193.yaml
References:
https://lists.apache.org/thread.html/1addbb49a1fc0947fb32ca663d76d93cfaade35a4848a76d4b4ded9c@%3Cissues.lucene.apache.org%3E