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Security report for d41.co

Dun & Bradstreet · 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 to provide an opt-out mechanism for its Visitor Intelligence tracking service, which helps website owners gain marketing insights by tracking business-related website traffic. The company is a recognized leader in business data analytics and marketing intelligence, targeting businesses and website owners seeking enhanced visitor data. The website content is professional and consistent with Dun & Bradstreet's corporate identity, offering clear privacy and cookie policy references and a straightforward opt-out button. Technically, the website uses standard web technologies including JavaScript and CSS, with a moderate performance profile and good mobile optimization. However, there is room for improvement in accessibility and SEO optimization. Security posture is adequate with HTTPS implied but lacks visible security headers and explicit security policy documentation. The site does not expose sensitive data and uses a cookie-based opt-out mechanism, but incident response and vulnerability disclosure information are absent. Overall, the website is trustworthy and compliant with privacy regulations such as GDPR, supported by comprehensive privacy and cookie policies linked from the page. No WAF or blocking mechanisms were detected, allowing full content access and analysis. The domain WHOIS data aligns well with the corporate identity, reinforcing legitimacy. Strategic recommendations include enhancing security headers, adding incident response contacts, and improving accessibility and SEO to strengthen the site's security and user experience.

Scanned

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 25 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

Email alerts on material changes and an exportable JSON history of every change.

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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
77
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. Their Visitor Intelligence product leverages IP and cookie data to provide actionable insights to business website owners. The business model is B2B, focusing on data-driven marketing solutions. The company targets medium to large enterprises and businesses interested in marketing analytics. The website content reflects a mature, enterprise-grade service with consistent branding and trust indicators such as official privacy policies and corporate email contacts. The lack of phone numbers and physical addresses on this page suggests a focus on digital self-service and support via email. The company’s ecosystem includes multiple regional privacy policies, indicating global operations and compliance efforts.

Security posture

The security posture of the website is moderate. HTTPS is presumably enabled, but no explicit security headers were detected in the provided data. The site uses a cookie-based opt-out mechanism to respect user privacy, aligning with GDPR requirements. However, there is no visible incident response or vulnerability disclosure information, which could be improved to enhance transparency and readiness. No vulnerabilities or exposed sensitive data were found in the analysis. The absence of security certifications or frameworks mentioned on the site suggests an opportunity to communicate security maturity more clearly. Overall, the site demonstrates basic security hygiene but would benefit from enhanced security policies and headers.

Recommendations

  1. Implement and verify HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options to improve security posture.
  2. Publish explicit incident response and vulnerability disclosure policies to increase transparency and user trust.
  3. Enhance website accessibility features to comply with WCAG standards and improve user experience for all visitors.
  4. Improve SEO metadata and structured data to boost search engine visibility and content discoverability.
  5. Consider adding more comprehensive contact information, including phone numbers and physical addresses, to strengthen business credibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dun & Bradstreet
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, Business data analytics
Content quality
good
Branding
consistent

Technology

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

Security

Observed score
70/100
Good practices seen
  • Opt-out cookie mechanism for tracking

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 Dun & Bradstreet Visitor Intelligence tracking.
  2. Content is business-focused and professional.
  3. No signs of security blocking or WAF interference.
  4. Contact information limited to a corporate support email.
  5. No visible phone numbers or physical addresses on the page.
  6. No terms of service found on the analyzed page.
  7. No social media links detected in the provided HTML content.
Technical notes

Notes

The website employs standard front-end technologies including JavaScript and CSS, with a modular approach indicated by hashed filenames for CSS and JS assets. The site is mobile optimized and loads with moderate performance. There is no detected CMS or advanced frameworks from the provided data, suggesting a custom or lightweight implementation. The lack of visible security headers and limited metadata indicates some technical debt and opportunities for modernization. No hosting provider or platform details were identified. Overall, the technical infrastructure supports the business purpose but could be enhanced with modern security and SEO best practices.
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 +3Medium33 findingsView report
  2. 60/100Medium33 findingsView report
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