The Log4Shell vulnerability, identified as CVE-2021-44228, has prompted many organizations to evaluate their Java applications for potential risks. However, FusionAuth is not affected by this vulnerability because it uses the Logback logging framework instead of Log4j. Additionally, FusionAuth installations that utilize Elasticsearch are secure from remote code execution due to the Java Security Manager, though users are advised to ensure their configurations adhere to security guidelines. Despite the emergence of a related vulnerability, CVE-2021-45046, FusionAuth remains unaffected, and the company emphasizes its commitment to security through practices like responsible disclosure and regular penetration tests.