CVE-2021-44521

When running Apache Cassandra with the following configuration: enableuserdefinedfunctions: true enablescripteduserdefinedfunctions: true enableuserdefinedfunctions_threads: false it is possible for an attacker to execute arbitrary code on the host. The attacker would need to have enough permissions to create user defined functions in the cluster to be able to exploit this. Note that this configuration is documented as unsafe, and will continue to be considered unsafe after this CVE.