There is 1 open security issue in buster.
1 issue left for the package maintainer to handle:
A shell injection flaw was found in pglogical in versions before 2.3.4 and before 3.6.26. An attacker with CREATEDB privileges on a PostgreSQL server can craft a database name that allows execution of shell commands as the postgresql user when calling pglogical.create_subscription().
You can find information about how to handle this issue in the security team's documentation.