Control 3.1.22

★What This Means in Plain English

CUI must never be posted on public-facing websites, shared drives, or other publicly accessible systems unless specifically authorized. You need processes to review content before it goes public and to detect any accidental CUI exposure.

✓How Petronella Implements This Control

Petronella Technology Group implements this control through:

• Content review and approval workflow before any information is published to public-facing systems
• Microsoft Information Protection labels preventing CUI-labeled documents from being uploaded to public sites
• DLP scanning on email and SharePoint to detect CUI in outbound or public-facing content
• Web application firewall rules preventing CUI patterns from appearing in public responses
• ComplianceArmor tracking designated public content approvers and approval records

🔎Assessment Guidance

Assessors will review the content publishing approval process, verify that CUI cannot be posted to public systems without review, test DLP controls detecting CUI in public content, and check that public-facing systems are inventoried and monitored.

⚠Common Implementation Gaps

• No content review process for public-facing systems
• CUI accidentally posted on company website or public SharePoint
• No DLP controls scanning public-facing content
• Employees posting CUI on public cloud storage (Dropbox, Google Drive)
• No inventory of publicly accessible information systems

⇄Cross-Framework Mapping