Logstash is susceptible to Log4j JNDI remote code execution. Logstash is a free and open server-side data processing pipeline that ingests data from a multitude of sources, transforms it, and then sends it to your favorite "stash."
id: logstash-log4j-rce
info:
name: Logstash - Remote Code Execution (Apache Log4j)
author: shai
...