CIS.M365.1.3.5: Ensure internal phishing protection for Forms is enabled

CIS Benchmark notice

This check implements a recommendation of the CIS Microsoft 365 Foundations Benchmark. The benchmark text is © Center for Internet Security, Inc. and is not reproduced here beyond the short summary below. Get the full benchmark free of charge from cisecurity.org.

ID	CIS.M365.1.3.5
Severity	Medium
Suite	CIS Microsoft 365 Foundations Benchmark
Product	Microsoft 365
Feature	Organization settings
Security area	Email and collaboration protection
Resource type	Tenant
User impact of fixing	Low
Effort to fix	Low
Benchmark	CIS Microsoft 365 Foundations Benchmark 7.0.0, 1.3.5 (L1, E3 Level 1, E5 Level 1)
Framework controls	cis-m365:1.3.5 nist-800-53-r5:SI-8 Spam Protection
MITRE ATT&CK	T1534, T1598
Reads from	Microsoft Graph

What this checks and how to fix it

1.3.5 (L1) Ensure internal phishing protection for Forms is enabled

Microsoft Forms can be used for phishing attacks by asking personal or sensitive information and collecting the results. Microsoft 365 has built-in protection that will proactively scan for phishing attempt in forms such personal information request.

Rationale

Enabling internal phishing protection for Microsoft Forms will prevent attackers using forms for phishing attacks by asking personal or other sensitive information and URLs.

Impact

If potential phishing was detected, the form will be temporarily blocked and cannot be distributed, and response collection will not happen until it is unblocked by the administrator or keywords were removed by the creator.

Remediation action

1. Navigate to Microsoft 365 admin center.
2. Click to expand Settings select Org settings.
3. In Services select Microsoft Forms
4. Enable Add internal phishing protection under Phishing protection
5. Click Save.

PowerShell

1. Connect to the Microsoft Graph service using Connect-MgGraph -Scopes "OrgSettings-AppsAndServices.ReadWrite.All".
2. Run the following Microsoft Graph PowerShell commands:

$uri = 'https://graph.microsoft.com/beta/admin/forms/settings'
$body = @{ "isInOrgFormsPhishingScanEnabled" = $true } | ConvertTo-Json
Invoke-MgGraphRequest -Method PATCH -Uri $uri -Body $body

Related links

• Microsoft 365 admin center
• Administrator settings for Microsoft Forms
• Review and unblock forms or users detected and blocked for potential phishing
• CIS Microsoft 365 Foundations Benchmark v7.0.0 - Page 63

---

Mito check, based on CIS Microsoft 365 Foundations Benchmark. Author: oed-metzb; contributors: Mynster9361. Open-source licences.