Oracle Forms 4.5 through 10g starts form executables from arbitrary directories and executes them as the Oracle or System user, which allows attackers to execute arbitrary code by uploading a malicious .fmx file and referencing it using an absolute pathname argument in the (1) form or (2) module parameters to f90servlet.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2373
http://www.red-database-security.com/advisory/oracle_forms_run_any_os_command.html