diff --git a/monkey/monkey_island/cc/resources/pba_file_upload.py b/monkey/monkey_island/cc/resources/pba_file_upload.py
index 23554ab06..68be20e9a 100644
--- a/monkey/monkey_island/cc/resources/pba_file_upload.py
+++ b/monkey/monkey_island/cc/resources/pba_file_upload.py
@@ -1,4 +1,5 @@
 import copy
+from http import HTTPStatus
 
 import flask_restful
 from flask import Response, request, send_from_directory
@@ -27,6 +28,9 @@ class FileUpload(flask_restful.Resource):
         :param file_type: Type indicates which file to send, linux or windows
         :return: Returns file contents
         """
+        if self.is_pba_file_type_supported(file_type):
+            return Response(status=HTTPStatus.UNPROCESSABLE_ENTITY, mimetype="text/plain")
+
         # Verify that file_name is indeed a file from config
         if file_type == LINUX_PBA_TYPE:
             filename = ConfigService.get_config_value(copy.deepcopy(PBA_LINUX_FILENAME_PATH))
@@ -41,6 +45,9 @@ class FileUpload(flask_restful.Resource):
         :param file_type: Type indicates which file was received, linux or windows
         :return: Returns flask response object with uploaded file's filename
         """
+        if self.is_pba_file_type_supported(file_type):
+            return Response(status=HTTPStatus.UNPROCESSABLE_ENTITY, mimetype="text/plain")
+
         filename = FileUpload.upload_pba_file(
             request.files["filepond"], (file_type == LINUX_PBA_TYPE)
         )
@@ -74,6 +81,9 @@ class FileUpload(flask_restful.Resource):
         :param file_type: Type indicates which file was deleted, linux of windows
         :return: Empty response
         """
+        if self.is_pba_file_type_supported(file_type):
+            return Response(status=HTTPStatus.UNPROCESSABLE_ENTITY, mimetype="text/plain")
+
         filename_path = (
             PBA_LINUX_FILENAME_PATH if file_type == "PBAlinux" else PBA_WINDOWS_FILENAME_PATH
         )
@@ -83,3 +93,7 @@ class FileUpload(flask_restful.Resource):
             ConfigService.set_config_value(filename_path, "")
 
         return {}
+
+    @staticmethod
+    def is_pba_file_type_supported(file_type: str) -> bool:
+        return file_type not in {LINUX_PBA_TYPE, WINDOWS_PBA_TYPE}
diff --git a/monkey/tests/unit_tests/monkey_island/cc/resources/test_pba_file_upload.py b/monkey/tests/unit_tests/monkey_island/cc/resources/test_pba_file_upload.py
new file mode 100644
index 000000000..c06f0c400
--- /dev/null
+++ b/monkey/tests/unit_tests/monkey_island/cc/resources/test_pba_file_upload.py
@@ -0,0 +1,125 @@
+import pytest
+from tests.utils import raise_
+
+from monkey_island.cc.resources.pba_file_upload import LINUX_PBA_TYPE, WINDOWS_PBA_TYPE
+from monkey_island.cc.services.post_breach_files import PostBreachFilesService
+
+TEST_FILE = b"""-----------------------------1
+Content-Disposition: form-data; name="filepond"
+
+{}
+-----------------------------1
+Content-Disposition: form-data; name="filepond"; filename="test.py"
+Content-Type: text/x-python
+
+m0nk3y
+-----------------------------1--"""
+
+
+@pytest.fixture(autouse=True)
+def custom_pba_directory(tmpdir):
+    PostBreachFilesService.initialize(tmpdir)
+
+
+@pytest.fixture
+def mock_set_config_value(monkeypatch):
+    monkeypatch.setattr(
+        "monkey_island.cc.services.config.ConfigService.set_config_value", lambda _, __: None
+    )
+
+
+@pytest.fixture
+def mock_get_config_value(monkeypatch):
+    monkeypatch.setattr(
+        "monkey_island.cc.services.config.ConfigService.get_config_value", lambda _: "test.py"
+    )
+
+
+@pytest.mark.parametrize("pba_os", [LINUX_PBA_TYPE, WINDOWS_PBA_TYPE])
+def test_pba_file_upload_post(flask_client, pba_os, monkeypatch, mock_set_config_value):
+    resp = flask_client.post(
+        f"/api/fileUpload/{pba_os}",
+        data=TEST_FILE,
+        content_type="multipart/form-data; " "boundary=---------------------------" "1",
+        follow_redirects=True,
+    )
+    assert resp.status_code == 200
+
+
+def test_pba_file_upload_post__invalid(flask_client, monkeypatch, mock_set_config_value):
+    resp = flask_client.post(
+        "/api/fileUpload/bogus",
+        data=TEST_FILE,
+        content_type="multipart/form-data; " "boundary=---------------------------" "1",
+        follow_redirects=True,
+    )
+    assert resp.status_code == 422
+
+
+@pytest.mark.parametrize("pba_os", [LINUX_PBA_TYPE, WINDOWS_PBA_TYPE])
+def test_pba_file_upload_post__internal_server_error(
+    flask_client, pba_os, monkeypatch, mock_set_config_value
+):
+    monkeypatch.setattr(
+        "monkey_island.cc.resources.pba_file_upload.FileUpload.upload_pba_file",
+        lambda x, y: raise_(Exception()),
+    )
+
+    resp = flask_client.post(
+        f"/api/fileUpload/{pba_os}",
+        data=TEST_FILE,
+        content_type="multipart/form-data; boundary=---------------------------1",
+        follow_redirects=True,
+    )
+    assert resp.status_code == 500
+
+
+@pytest.mark.parametrize("pba_os", [LINUX_PBA_TYPE, WINDOWS_PBA_TYPE])
+def test_pba_file_upload_get__file_not_found(
+    flask_client, pba_os, monkeypatch, mock_get_config_value
+):
+    resp = flask_client.get(f"/api/fileUpload/{pba_os}?load=bogus_mogus.py")
+    assert resp.status_code == 404
+
+
+@pytest.mark.parametrize("pba_os", [LINUX_PBA_TYPE, WINDOWS_PBA_TYPE])
+def test_pba_file_upload_endpoint(
+    flask_client, pba_os, monkeypatch, mock_get_config_value, mock_set_config_value
+):
+    resp_post = flask_client.post(
+        f"/api/fileUpload/{pba_os}",
+        data=TEST_FILE,
+        content_type="multipart/form-data; " "boundary=---------------------------" "1",
+        follow_redirects=True,
+    )
+    resp_get = flask_client.get(f"/api/fileUpload/{pba_os}?load=test.py")
+    resp_delete = flask_client.delete(
+        f"/api/fileUpload/{pba_os}", data="test.py", content_type="text/plain;"
+    )
+    resp_get_del = flask_client.get(f"/api/fileUpload/{pba_os}?load=test.py")
+    assert resp_post.status_code == 200
+
+    assert resp_get.status_code == 200
+    assert resp_get.data.decode() == "m0nk3y"
+
+    assert resp_delete.status_code == 200
+
+    assert resp_get_del.status_code == 404
+
+
+def test_pba_file_upload_endpoint__invalid(
+    flask_client, monkeypatch, mock_set_config_value, mock_get_config_value
+):
+    resp_post = flask_client.post(
+        "/api/fileUpload/bogus",
+        data=TEST_FILE,
+        content_type="multipart/form-data; " "boundary=---------------------------" "1",
+        follow_redirects=True,
+    )
+    resp_get = flask_client.get("/api/fileUpload/bogus?load=test.py")
+    resp_delete = flask_client.delete(
+        "/api/fileUpload/bogus", data="test.py", content_type="text/plain;"
+    )
+    assert resp_post.status_code == 422
+    assert resp_get.status_code == 422
+    assert resp_delete.status_code == 422