Publisher must be configured to prompt the user when another application programmatically opens a macro.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-223390 | O365-PU-000001 | SV-223390r961086_rule | CCI-001662 | medium |
| Description | ||||
| This policy setting controls whether the specified Office application notifies users when unsigned application add-ins are loaded or silently disable such add-ins without notification. This policy setting only applies if you enable the "Require that application add-ins are signed by Trusted Publisher" policy setting, which prevents users from changing this policy setting. If you enable this policy setting, applications automatically disable unsigned add-ins without informing users. If you disable this policy setting, if this application is configured to require that all add-ins be signed by a trusted publisher, any unsigned add-ins the application loads will be disabled and the application will display the Trust Bar at the top of the active window. The Trust Bar contains a message that informs users about the unsigned add-in. If you do not configure this policy setting, the disable behavior applies, and in addition, users can configure this requirement themselves in the "Add-ins" category of the Trust Center for the application. | ||||
| STIG | Date | |||
| Microsoft Office 365 ProPlus Security Technical Implementation Guide | 2025-03-05 | |||
Details
Check Text (C-223390r961086_chk)
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Publisher 2016 >> Security >> Publisher Automation Security Level is set to "Enabled" "By UI (prompted)".
Use the Windows Registry Editor to navigate to the following key:
HKCU\software\policies\microsoft\office\common\security
If the value automationsecuritypublisher is REG_DWORD = 2, this is not a finding.
Fix Text (F-25051r442390_fix)
Set the policy value for User Configuration >> Administrative Templates >> Microsoft Publisher 2016 >> Security >> Publisher Automation Security Level to "Enabled" "By UI (prompted)"