Security checks — sorted by severity
Security Headers
Only 2/5 security headers present. Missing: X-Content-Type-Options, X-Frame-Options, Permissions-Policy. This exposes the application to clickjacking, MIME-sniffing, and other client-side attacks.
Only 2/5 security headers present. Missing: X-Content-Type-Options, X-Frame-Options, Permissions-Policy. This exposes the application to clickjacking, MIME-sniffing, and other client-side attacks.
DNS Configuration
Strengths: 2 nameservers configured (dana.ns.cloudflare.com., woz.ns.cloudflare.com.); Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
Strengths: 2 nameservers configured (dana.ns.cloudflare.com., woz.ns.cloudflare.com.); Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
DMARC / Email Security
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (may use non-standard selectors).
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (may use non-standard selectors).
Certificate Hygiene
Strengths: Certificate valid, 33 days remaining; Issued by Google Trust Services. Issues: Wildcard certificate in use — broader attack surface if compromised.
Strengths: Certificate valid, 33 days remaining; Issued by Google Trust Services. Issues: Wildcard certificate in use — broader attack surface if compromised.
TLS Configuration
TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
Known Breaches
No known breaches found in public disclosure databases.
No known breaches found in public disclosure databases.
CVE Exposure
Detected technologies: cloudflare, Next.js. (cloudflare detected but excluded from CVE matching — upstream infrastructure). No version information exposed — CVE matching not possible (this is good practice).
Detected technologies: cloudflare, Next.js. (cloudflare detected but excluded from CVE matching — upstream infrastructure). No version information exposed — CVE matching not possible (this is good practice).
HSTS Header
HSTS enabled: max-age=31536000 with includeSubDomains and preload. Meets best-practice configuration.
HSTS enabled: max-age=31536000 with includeSubDomains and preload. Meets best-practice configuration.
Recommended actions
1+ items
Steps to improve notion.so's security grade, ranked by impact.
1
Strengthen email authentication configuration
Email authentication is partially configured for notion.so but has gaps. Actions needed: add SPF record; configure DKIM. Until DMARC enforcement is active, spoofed emails may still reach recipients.
NIST CSFPR.AC-7
Email authentication is a required access control
How to fix this
1
Add SPF record if missing: v=spf1 include:_spf.google.com -all
2
Configure DKIM and publish public key in DNS
3
Verify with: nslookup -type=txt _dmarc.notion.so
See all 3 remaining recommendations
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AI Summary
What this means
notion.so scored 75/100, meeting baseline requirements but with 3 findings that require attention. The vendor can proceed with a remediation timeline agreement.
Critical gaps in: Security Headers. Positive signals: TLS Configuration, Known Breaches, CVE Exposure all passed.
4 action items identified, including 0 critical. The issues are configuration gaps, not architectural problems. A focused remediation effort of 2–5 days could address all findings.
How notion.so compares
Grade distribution across 2678 companies we've scanned. notion.so scores better than 55% of them.
88
A+
28
A
194
A-
200
B+
75
B
376
B-
137
C+
117
C
347
C-
123
D+
96
D
265
D-
632
F
notion.so — Grade C (75/100)
2678 companies scanned
At a glance
Key data points from the scan.
TLS Version
TLSv1.3
TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
DMARC Policy
p=quarantine
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (may use non-standard selectors).
SPF Record
Missing
No SPF record found.
Security Headers
2/5 present
Missing: X-Content-Type-Options, X-Frame-Options, Permissions-Policy
HSTS
Enabled
HSTS enabled: max-age=31536000 with includeSubDomains and preload. Meets best-practice configuration.
SSL Certificate
Issues
Strengths: Certificate valid, 33 days remaining; Issued by Google Trust Services. Issues: Wildcard certificate in use — broader attack surface if compromised.
DNSSEC
Not enabled
Strengths: 2 nameservers configured (dana.ns.cloudflare.com., woz.ns.cloudflare.com.); Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
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