The send_the_mail function in server/svr_mail.c in Terascale Open-Source Resource and Queue Manager (aka TORQUE Resource Manager) before 4.2.6 allows remote attackers to execute arbitrary commands via shell metacharacters in the email (-M switch) to qsub.

pbs_mom in Terascale Open-Source Resource and Queue Manager (aka TORQUE Resource Manager) 2.5.x, 4.x, and earlier does not properly restrict access by unprivileged ports, which allows remote authenticated users to execute arbitrary jobs by submitting a command.