CVE-2021-44228 - Logstahs - ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath

Elastic has come out with a removal tool and an excellent article on Logstash - Logstash 5.0.0-6.8.20 and 7.0.0-7.16.0: Log4j CVE-2021-44228, CVE-2021-45046 remediation