diff --git a/x-pack/plugins/security_solution/common/endpoint/data_generators/endpoint_action_generator.ts b/x-pack/plugins/security_solution/common/endpoint/data_generators/endpoint_action_generator.ts
index f4a454456c16a..03f769e34c5d8 100644
--- a/x-pack/plugins/security_solution/common/endpoint/data_generators/endpoint_action_generator.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/data_generators/endpoint_action_generator.ts
@@ -274,12 +274,10 @@ export class EndpointActionGenerator extends BaseDataGenerator {
       >;
 
       uploadActionDetails.parameters = {
-        file: {
-          file_id: 'file-x-y-z',
-          file_name: 'foo.txt',
-          size: 1234,
-          sha256: 'file-hash-sha-256',
-        },
+        file_id: 'file-x-y-z',
+        file_name: 'foo.txt',
+        file_size: 1234,
+        file_sha256: 'file-hash-sha-256',
       };
 
       uploadActionDetails.outputs = {
diff --git a/x-pack/plugins/security_solution/common/endpoint/types/actions.ts b/x-pack/plugins/security_solution/common/endpoint/types/actions.ts
index 7539b85c3397c..c06e890305793 100644
--- a/x-pack/plugins/security_solution/common/endpoint/types/actions.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/types/actions.ts
@@ -477,12 +477,10 @@ export interface ActionFileInfoApiResponse {
  * the action's parameters via the API route handler
  */
 export type ResponseActionUploadParameters = UploadActionApiRequestBody['parameters'] & {
-  file: {
-    sha256: string;
-    size: number;
-    file_name: string;
-    file_id: string;
-  };
+  file_sha256: string;
+  file_size: number;
+  file_name: string;
+  file_id: string;
 };
 
 export interface ResponseActionUploadOutputContent {
diff --git a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/action_log_expanded_tray.tsx b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/action_log_expanded_tray.tsx
index e7fe639d606a2..3ee32999aeec6 100644
--- a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/action_log_expanded_tray.tsx
+++ b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/action_log_expanded_tray.tsx
@@ -8,6 +8,7 @@
 import React, { memo, useMemo } from 'react';
 import { EuiCodeBlock, EuiFlexGroup, EuiFlexItem, EuiDescriptionList } from '@elastic/eui';
 import { css, euiStyled } from '@kbn/kibana-react-plugin/common';
+import { EndpointUploadActionResult } from '../../endpoint_upload_action_result';
 import { useUserPrivileges } from '../../../../common/components/user_privileges';
 import { OUTPUT_MESSAGES } from '../translations';
 import { getUiCommand } from './hooks';
@@ -16,6 +17,10 @@ import { ResponseActionFileDownloadLink } from '../../response_action_file_downl
 import { ExecuteActionHostResponse } from '../../endpoint_execute_action';
 import { getEmptyValue } from '../../../../common/components/empty_value';
 
+import type {
+  ResponseActionUploadOutputContent,
+  ResponseActionUploadParameters,
+} from '../../../../../common/endpoint/types';
 import { type ActionDetails, type MaybeImmutable } from '../../../../../common/endpoint/types';
 
 const emptyValue = getEmptyValue();
@@ -75,6 +80,12 @@ const StyledEuiFlexGroup = euiStyled(EuiFlexGroup).attrs({
   overflow-y: auto;
 `;
 
+const isUploadAction = (
+  action: MaybeImmutable<ActionDetails>
+): action is ActionDetails<ResponseActionUploadOutputContent, ResponseActionUploadParameters> => {
+  return action.command === 'upload';
+};
+
 const OutputContent = memo<{ action: MaybeImmutable<ActionDetails>; 'data-test-subj'?: string }>(
   ({ action, 'data-test-subj': dataTestSubj }) => {
     const getTestId = useTestIdGenerator(dataTestSubj);
@@ -145,6 +156,20 @@ const OutputContent = memo<{ action: MaybeImmutable<ActionDetails>; 'data-test-s
       );
     }
 
+    if (isUploadAction(action)) {
+      return (
+        <EuiFlexGroup direction="column" data-test-subj={getTestId('uploadDetails')}>
+          <p>{OUTPUT_MESSAGES.wasSuccessful(command)}</p>
+
+          <EndpointUploadActionResult
+            action={action}
+            data-test-subj={getTestId('uploadOutput')}
+            textSize="xs"
+          />
+        </EuiFlexGroup>
+      );
+    }
+
     return <>{OUTPUT_MESSAGES.wasSuccessful(command)}</>;
   }
 );
diff --git a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/integration_tests/response_actions_log.test.tsx b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/integration_tests/response_actions_log.test.tsx
index 088809509cd50..d9226436e4f3b 100644
--- a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/integration_tests/response_actions_log.test.tsx
+++ b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/integration_tests/response_actions_log.test.tsx
@@ -16,8 +16,11 @@ import {
 } from '../../../../common/mock/endpoint';
 import { ResponseActionsLog } from '../response_actions_log';
 import type {
+  ActionDetails,
   ActionDetailsApiResponse,
   ActionFileInfoApiResponse,
+  ResponseActionUploadOutputContent,
+  ResponseActionUploadParameters,
 } from '../../../../../common/endpoint/types';
 import { MANAGEMENT_PATH } from '../../../../../common/constants';
 import { getActionListMock } from '../mocks';
@@ -29,6 +32,8 @@ import { responseActionsHttpMocks } from '../../../mocks/response_actions_http_m
 import { waitFor } from '@testing-library/react';
 import { getEndpointAuthzInitialStateMock } from '../../../../../common/endpoint/service/authz/mocks';
 import { useGetEndpointActionList as _useGetEndpointActionList } from '../../../hooks/response_actions/use_get_endpoint_action_list';
+import { OUTPUT_MESSAGES } from '../translations';
+import { EndpointActionGenerator } from '../../../../../common/endpoint/data_generators/endpoint_action_generator';
 
 const useGetEndpointActionListMock = _useGetEndpointActionList as jest.Mock;
 
@@ -786,6 +791,84 @@ describe('Response actions history', () => {
         }
       );
     });
+
+    describe('`upload` action', () => {
+      let action: ActionDetails<ResponseActionUploadOutputContent, ResponseActionUploadParameters>;
+
+      beforeEach(async () => {
+        action = new EndpointActionGenerator().generateActionDetails<
+          ResponseActionUploadOutputContent,
+          ResponseActionUploadParameters
+        >({ command: 'upload' });
+
+        const actionListApiResponse = await getActionListMock({
+          actionCount: 1,
+          commands: ['upload'],
+        });
+
+        actionListApiResponse.data = [action];
+
+        useGetEndpointActionListMock.mockReturnValue({
+          ...getBaseMockedActionList(),
+          data: actionListApiResponse,
+        });
+      });
+
+      it('should display pending output if action is not complete yet', () => {
+        action.isCompleted = false;
+        const { getByTestId } = render();
+        getByTestId(`${testPrefix}-expand-button`).click();
+
+        expect(getByTestId(`${testPrefix}-details-tray-output`)).toHaveTextContent(
+          OUTPUT_MESSAGES.isPending('upload')
+        );
+      });
+
+      it('should display output for single agent', () => {
+        const { getByTestId } = render();
+        getByTestId(`${testPrefix}-expand-button`).click();
+
+        expect(getByTestId(`${testPrefix}-uploadDetails`)).toHaveTextContent(
+          'upload completed successfully' +
+            'File saved to: /path/to/uploaded/file' +
+            'Free disk space on drive: 1.18MB'
+        );
+      });
+
+      it('should display output for multiple agents', () => {
+        action.agents.push('agent-b');
+        action.hosts['agent-b'] = {
+          name: 'host b',
+        };
+        action.agentState['agent-b'] = {
+          errors: undefined,
+          wasSuccessful: true,
+          isCompleted: true,
+          completedAt: '2023-05-10T20:09:25.824Z',
+        };
+        (action.outputs = action.outputs ?? {})['agent-b'] = {
+          type: 'json',
+          content: {
+            code: 'ra_upload_file-success',
+            path: 'some/path/to/file',
+            disk_free_space: 123445,
+          },
+        };
+
+        const { getByTestId } = render();
+        getByTestId(`${testPrefix}-expand-button`).click();
+
+        expect(getByTestId(`${testPrefix}-uploadDetails`)).toHaveTextContent(
+          'upload completed successfully' +
+            'Host: Host-agent-a' +
+            'File saved to: /path/to/uploaded/file' +
+            'Free disk space on drive: 1.18MB' +
+            'Host: host b' +
+            'File saved to: some/path/to/file' +
+            'Free disk space on drive: 120.55KB'
+        );
+      });
+    });
   });
 
   describe('Action status ', () => {
diff --git a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/mocks.tsx b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/mocks.tsx
index 480239d1eee6a..76ae714eb9555 100644
--- a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/mocks.tsx
+++ b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/mocks.tsx
@@ -50,15 +50,49 @@ export const getActionListMock = async ({
       .map(() => uuidv4());
 
     const actionDetails: ActionListApiResponse['data'] = actionIds.map((actionId) => {
+      const command = (commands?.[0] ?? 'isolate') as ResponseActionsApiCommandNames;
       return endpointActionGenerator.generateActionDetails({
         agents: [id],
-        command: (commands?.[0] ?? 'isolate') as ResponseActionsApiCommandNames,
+        command,
         id: actionId,
         isCompleted,
         isExpired,
         wasSuccessful,
         status,
         completedAt: isExpired ? undefined : new Date().toISOString(),
+        hosts: {
+          ...(command === 'upload'
+            ? {
+                [id]: { name: 'host name' },
+              }
+            : {}),
+        },
+        agentState: {
+          ...(command === 'upload'
+            ? {
+                [id]: {
+                  errors: undefined,
+                  wasSuccessful: true,
+                  isCompleted: true,
+                  completedAt: '2023-05-10T20:09:25.824Z',
+                },
+              }
+            : {}),
+        },
+        outputs: {
+          ...(command === 'upload'
+            ? {
+                [id]: {
+                  type: 'json',
+                  content: {
+                    code: 'ra_upload_file-success',
+                    path: 'some/path/to/file',
+                    disk_free_space: 123445,
+                  },
+                },
+              }
+            : {}),
+        },
       });
     });
     return actionDetails;
diff --git a/x-pack/plugins/security_solution/public/management/components/endpoint_upload_action_result/endpoint_upload_action_result.tsx b/x-pack/plugins/security_solution/public/management/components/endpoint_upload_action_result/endpoint_upload_action_result.tsx
index 57b0cb389b65b..ee219ff5652e8 100644
--- a/x-pack/plugins/security_solution/public/management/components/endpoint_upload_action_result/endpoint_upload_action_result.tsx
+++ b/x-pack/plugins/security_solution/public/management/components/endpoint_upload_action_result/endpoint_upload_action_result.tsx
@@ -8,6 +8,7 @@
 import { FormattedMessage } from '@kbn/i18n-react';
 import type { PropsWithChildren } from 'react';
 import React, { memo, useMemo } from 'react';
+import type { EuiTextProps } from '@elastic/eui';
 import { EuiSpacer, EuiText } from '@elastic/eui';
 import { i18n } from '@kbn/i18n';
 import numeral from '@elastic/numeral';
@@ -53,11 +54,12 @@ interface EndpointUploadActionResultProps {
   >;
   /** The agent id to display the result for. If undefined, the output for ALL agents will be displayed */
   agentId?: string;
+  textSize?: EuiTextProps['size'];
   'data-test-subj'?: string;
 }
 
 export const EndpointUploadActionResult = memo<EndpointUploadActionResultProps>(
-  ({ action: _action, agentId, 'data-test-subj': dataTestSubj }) => {
+  ({ action: _action, agentId, textSize = 's', 'data-test-subj': dataTestSubj }) => {
     const action = _action as ActionDetails<
       ResponseActionUploadOutputContent,
       ResponseActionUploadParameters
@@ -99,7 +101,7 @@ export const EndpointUploadActionResult = memo<EndpointUploadActionResultProps>(
     }
 
     return (
-      <div data-test-subj={getTestId()}>
+      <EuiText data-test-subj={getTestId()} size={textSize}>
         {outputs.map(({ name, state, result }) => {
           // Use case: action log
           if (!state.isCompleted) {
@@ -157,7 +159,7 @@ export const EndpointUploadActionResult = memo<EndpointUploadActionResultProps>(
             </HostUploadResult>
           );
         })}
-      </div>
+      </EuiText>
     );
   }
 );
@@ -169,9 +171,8 @@ export interface KeyValueDisplayProps {
 }
 const KeyValueDisplay = memo<KeyValueDisplayProps>(({ name, value }) => {
   return (
-    <EuiText
+    <div
       className="eui-textBreakWord"
-      size="s"
       css={css`
         white-space: pre-wrap;
       `}
@@ -181,7 +182,7 @@ const KeyValueDisplay = memo<KeyValueDisplayProps>(({ name, value }) => {
         {': '}
       </strong>
       {value}
-    </EuiText>
+    </div>
   );
 });
 KeyValueDisplay.displayName = 'KeyValueDisplay';
diff --git a/x-pack/plugins/security_solution/public/management/hooks/response_actions/use_send_upload_endpoint_request.ts b/x-pack/plugins/security_solution/public/management/hooks/response_actions/use_send_upload_endpoint_request.ts
index 709bf2afcc0c6..04189a9eee3a1 100644
--- a/x-pack/plugins/security_solution/public/management/hooks/response_actions/use_send_upload_endpoint_request.ts
+++ b/x-pack/plugins/security_solution/public/management/hooks/response_actions/use_send_upload_endpoint_request.ts
@@ -29,7 +29,7 @@ export const useSendUploadEndpointRequest = (
       formData.append('file', file, file.name);
 
       for (const [key, value] of Object.entries(payload)) {
-        formData.append(key, JSON.stringify(value));
+        formData.append(key, typeof value !== 'string' ? JSON.stringify(value) : value);
       }
 
       return http.post<ResponseActionApiResponse>(UPLOAD_ROUTE, {
diff --git a/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.test.ts b/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.test.ts
index 5f165dd02ce87..b34d3ecca9984 100644
--- a/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.test.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.test.ts
@@ -170,12 +170,10 @@ describe('Upload response action create API handler', () => {
           command: 'upload',
           endpoint_ids: ['123-456'],
           parameters: {
-            file: {
-              file_id: '123',
-              file_name: 'test.txt',
-              sha256: 'abc',
-              size: 1234,
-            },
+            file_id: '123',
+            file_name: 'test.txt',
+            file_sha256: 'abc',
+            file_size: 1234,
             overwrite: true,
           },
           user: undefined,
diff --git a/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.ts b/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.ts
index 0edc36a3497a5..85d0b26a0cb3f 100644
--- a/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/routes/actions/file_upload_handler.ts
@@ -75,12 +75,10 @@ export const getActionFileUploadHandler = (
     const { file: _, parameters: userParams, ...actionPayload } = req.body;
     const uploadParameters: ResponseActionUploadParameters = {
       ...userParams,
-      file: {
-        file_id: '',
-        file_name: '',
-        sha256: '',
-        size: 0,
-      },
+      file_id: '',
+      file_name: '',
+      file_sha256: '',
+      file_size: 0,
     };
 
     try {
@@ -92,10 +90,10 @@ export const getActionFileUploadHandler = (
         maxFileBytes,
       });
 
-      uploadParameters.file.file_id = createdFile.file.id;
-      uploadParameters.file.file_name = createdFile.file.name;
-      uploadParameters.file.sha256 = createdFile.file.hash?.sha256;
-      uploadParameters.file.size = createdFile.file.size;
+      uploadParameters.file_id = createdFile.file.id;
+      uploadParameters.file_name = createdFile.file.name;
+      uploadParameters.file_sha256 = createdFile.file.hash?.sha256;
+      uploadParameters.file_size = createdFile.file.size;
     } catch (err) {
       return errorHandler(logger, res, err);
     }
@@ -131,10 +129,10 @@ export const getActionFileUploadHandler = (
         },
       });
     } catch (err) {
-      if (uploadParameters.file.file_id) {
+      if (uploadParameters.file_id) {
         // Try to delete the created file since creating the action threw an error
         try {
-          await deleteFile(esClient, logger, uploadParameters.file.file_id);
+          await deleteFile(esClient, logger, uploadParameters.file_id);
         } catch (e) {
           logger.error(
             `Attempt to clean up file (after action creation was unsuccessful) failed; ${e.message}`,
diff --git a/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.test.ts b/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.test.ts
index 629be3be03b2a..7b3db55bc67a2 100644
--- a/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.test.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.test.ts
@@ -251,10 +251,10 @@ describe('Action Files service', () => {
     });
 
     it('should throw an error no `action.parameters.file.file_id` defined', async () => {
-      action.parameters!.file.file_id = '';
+      action.parameters!.file_id = '';
 
       await expect(setFileActionId(esClientMock, loggerMock, action)).rejects.toThrow(
-        "Action [123] has no 'parameters.file.file_id' defined. Unable to set action id on file record"
+        "Action [123] has no 'parameters.file_id' defined. Unable to set action id on file metadata record"
       );
     });
   });
diff --git a/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.ts b/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.ts
index b00b3f62ae5c8..71a25d50b77e3 100644
--- a/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/services/actions/action_files.ts
@@ -296,13 +296,13 @@ export const setFileActionId = async (
   action: ActionDetails<ResponseActionUploadOutputContent, ResponseActionUploadParameters>
 ): Promise<UploadedFile> => {
   assert(
-    action.parameters?.file.file_id,
-    `Action [${action.id}] has no 'parameters.file.file_id' defined. Unable to set action id on file record`
+    action.parameters?.file_id,
+    `Action [${action.id}] has no 'parameters.file_id' defined. Unable to set action id on file metadata record`
   );
 
   const fileClient = getFileClient(esClient, logger);
   const file = await fileClient.get<UploadFileInternalStorageMeta>({
-    id: action.parameters?.file.file_id,
+    id: action.parameters?.file_id,
   });
 
   await file.update({