Log4shell - Five Eyes published a scanner for everyone
Log4shell
As you may have heard, since December 9 there is a severe vulnerability called Log4shell (and other Log4j-related vulnerabilities) that affects a wide range of Java applications. The "Apache Log4j2 2.0-beta9 through 2.12.1 and 2.13.0 through 2.15.0 JNDI" library.