Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.
A vulnerability in Supervisor was discovered in which an authenticated client could send malicious XML-RPC requests and supervidord will run them as shell commands with process privileges. In some cases, supervisord is configured with root permissions.
A remote attacker could execute arbitrary code with the privileges of the process.
There is no known workaround at this time.
All Supervisor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose "=app-admin/supervisor-3.1.4"