Apache Solr is a search server based on Lucene (a full-text search engine) of the Apache Foundation in the United States. The product supports level search, vertical search, highlight search results, etc. Apache Solr versions prior to 8.8.2 have a code issue vulnerability that allows attackers to read arbitrary file. This rule supports to defend the A6: Vulnerable and Outdated Components of OWASP Top 10 - 2021. Other reference:None