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Security report for d41.co

Dun & Bradstreet, Inc. · Technology · United States

Medium risk. 7 critical or high findings in Email security, Security headers and 2 other checks.

Security score

63/100

Risk levelMedium

0–100, higher is better. How it is calculated

Dun & Bradstreet operates the d41.co domain as a dedicated opt-out portal for its Visitor Intelligence tracking service, which provides marketing insights by tracking business website traffic. The company is a well-established enterprise in the data and analytics sector, with a domain registration dating back to 2014 and consistent WHOIS data confirming legitimacy. The website is professionally designed with clear branding and provides comprehensive privacy and cookie policy links, supporting GDPR compliance. Technically, the site uses modern JavaScript and CSS, hosted on AWS infrastructure, with moderate performance and good mobile optimization. Security posture is adequate with HTTPS enforced and domain status protections, though improvements such as enabling DNSSEC and adding security headers are recommended. No critical vulnerabilities or blocking mechanisms were detected, and the site maintains a high trust level with transparent contact information and privacy practices.

Scanned

This is an earlier scan of d41.co. View the latest report

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

7 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

Need hands-on remediation? Email guard@offseq.com

Keep watching d41.co

This scan found 24 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
82
Security headers
15
Email security
40
DNS health
75
Network security
100
GDPR outside view
68
Average
63

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention d41.co, from OffSeq Breach.

Total records
388
Employees
0
Customers
388
Third parties
0
Weak passwords
0%

5 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for d41.co.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Dun & Bradstreet holds a strong market position as a provider of business data and marketing intelligence services. The d41.co domain serves a specific function within their ecosystem, enabling users to opt out of Visitor Intelligence tracking. The business model is B2B focused, targeting companies interested in marketing analytics and data privacy compliance. The company leverages partnerships and maintains a consistent brand presence across domains. The absence of phone contacts or social media links on this specific site suggests a focused, self-service approach for privacy management. The domain's registration and hosting infrastructure reflect a mature and secure operational environment.

Security posture

The website demonstrates a moderate to good security posture with HTTPS enabled and domain registration protections in place. However, the lack of DNSSEC and absence of visible security headers such as Content-Security-Policy or HSTS represent areas for enhancement. No vulnerability disclosures or incident response contacts are published, which could be improved to increase transparency and readiness. The site does not expose sensitive data and uses secure cookie-based opt-out mechanisms. Overall, the security maturity is appropriate for the site's function but could benefit from additional hardening and published security policies.

Recommendations

  1. Enable DNSSEC to enhance DNS security and prevent spoofing.
  2. Implement and publish a formal security policy and incident response contact information.
  3. Add security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Provide a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Consider adding more comprehensive accessibility features to improve inclusivity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dun & Bradstreet, Inc.
Description
Dun & Bradstreet provides Visitor Intelligence services that track website traffic of businesses and business employees for marketing purposes using IP address lookups and cookie syncing.
Key services
Visitor Intelligence tracking opt-out service
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, AWS DNS, CSS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced (implied by domain)
  • Domain status includes clientUpdateProhibited, clientTransferProhibited, clientDeleteProhibited

Analytics and tracking

Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Visitor Intelligence
Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website provides a clear opt-out mechanism for Visitor Intelligence tracking
  2. Content is focused on privacy and compliance with links to official privacy and cookie policies
  3. No forms collecting personal data except the opt-out button which sets a cookie
  4. No social media links or phone numbers found on the page
  5. No security.txt or explicit security policy published
  6. No visible security headers detected in provided data
  7. DNSSEC not enabled, which is a minor security gap
  8. Website uses modern JavaScript and CSS assets
  9. No signs of WAF or content blocking
  10. WHOIS data is transparent and consistent with the business
Technical notes

Notes

The website uses a modern JavaScript and CSS stack with assets loaded from local sources. DNS is managed via Amazon AWS nameservers, indicating reliable hosting infrastructure. The site is mobile optimized and performs moderately well, though no explicit CMS or frameworks were detected. SEO and accessibility are basic but functional. The absence of advanced frameworks or CMS suggests a lightweight, purpose-built application focused on privacy opt-out functionality. Technical debt appears minimal, but security enhancements and accessibility improvements are recommended to future-proof the platform.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 63/100 +3Medium34 findingsView report
  2. 60/100Medium33 findingsView report
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