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CVE-2021-27905 PoC — SSRF vulnerability with the Replication handler

Source
https://github.com/Threekiii/Awesome-POC/blob/master/%E4%B8%AD%E9%97%B4%E4%BB%B6%E6%BC%8F%E6%B4%9E/Apache%20Solr%20Replication%20handler%20SSRF%20CVE-2021-27905.md
Associated Vulnerability
Title:SSRF vulnerability with the Replication handler (CVE-2021-27905)
Description:The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the "shards" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.
File Snapshot

 # Apache Solr Replication handler SSRF CVE-2021-27905

## 漏洞描述

Apache Solr是一个开源搜索服务引擎，Solr 使用 Java 

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