Multiple vulnerabilities in NASA fprime-gds through 3.4.3 allow an unauthenticated remote attacker to achieve arbitrary code execution on the ground station host and inject arbitrary commands to connected spacecraft. The Flask application in src/fprime_gds/flask/app.py applies no authentication to any endpoint. A path traversal in src/fprime_gds/flask/updown.py allows reading and writing arbitrary files outside the upload directory. A hardcoded secret key (CWE-321) in the application enables session forgery. Chained together, these vulnerabilities allow complete compromise of the ground data system and any spacecraft under its control.