The Debug programs user right must only be assigned to the Administrators group.
Inappropriate granting of user rights can provide system, administrative, and other high level capabilities.
Accounts with the "Debug Programs" user right can attach a debugger to any process or to the kernel, providing complete access to sensitive and critical operating system components. This right is given to Administrators in the default configuration.
How this relates to the STIG checklist: STIG vs SCAP benchmark.