Percona XtraBackup 2.4.20 unintentionally writes the command line to any resulting backup file output. This may include sensitive arguments passed at run time. In addition, when --history is passed at run time, this command line is also written to the PERCONA_SCHEMA.xtrabackup_history table. NOTE: this issue exists because of an incomplete fix for CVE-2020-10997.
https://jira.percona.com/browse/PXB-2722
https://docs.percona.com/percona-xtrabackup/2.4/release-notes/2.4/2.4.25.html