In Apache Log4j2 versions up to and including 2.14.1 (excluding security release 2.12.2), the JNDI features used in configurations, log messages, and parameters do not protect against attacker-controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled.

References:
https://nvd.nist.gov/vuln/detail/CVE-2021-44228
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44228
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45046
https://logging.apache.org/log4j/2.x/security.html
https://www.cisa.gov/uscert/apache-log4j-vulnerability-guidance