USN-5151-1 fixed several vulnerabilities in Mailman. This update provides
the corresponding update for Ubuntu 20.04 ESM.
Original advisory details:
It was discovered that Mailman incorrectly handled certain URL.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2021-43331)
It was discovered that Mailman incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2021-43332)