Welcome to Atlassian Community !!
Jira Software Self Hosted is not affected by this vulnerability.
Bitbucket server/Data Centre is the affected product by this CVE.
Please go through this link to find out more https://confluence.atlassian.com/security/multiple-products-security-advisory-log4j-vulnerable-to-remote-code-execution-cve-2021-44228-1103069934.html
Regards, Vishwas
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