There is 1 open security issue in buster.
1 issue left for the package maintainer to handle:
In GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server.
You can find information about how to handle this issue in the security team's documentation.