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Security report for sothebysdiamonds.com

Sotheby's · Retail · United States

Low risk. 3 critical or high findings in Security headers and GDPR outside view.

Security score

81/100

Risk levelLow

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

Sotheby's is a globally recognized auction house specializing in luxury goods including fine art and diamond jewelry. The website section analyzed focuses on diamond jewelry sales, targeting affluent buyers and collectors. The company operates a sophisticated online platform leveraging modern web technologies such as React, Next.js, and Auth0 for authentication, supported by analytics and consent management tools like Segment and OneTrust. The site demonstrates strong digital maturity with excellent design, mobile optimization, and SEO practices. Security posture is robust with HTTPS enforcement, security headers, and no visible vulnerabilities, although public incident response information is lacking. WHOIS data is unavailable, likely due to privacy protection, but the brand's reputation and trust signals mitigate concerns. Overall, the site is professional, secure, and compliant with privacy regulations, serving a high-end retail market effectively.

Scanned

NIS2 and GDPR posture

GDPR outside view
80/ 100 · Low
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

3 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

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

Keep watching sothebysdiamonds.com

This scan found 16 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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
100
Security headers
45
Email security
80
DNS health
80
Network security
100
GDPR outside view
80
Average
81

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

Technical appendix

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

Business context

Business profile

Sotheby's holds a leading position in the luxury auction market with a business model centered on auctioning and private sales of high-value items. Their revenue streams include commissions from auctions and direct sales. The target customer base is affluent individuals and collectors worldwide. The company maintains a strong partnership ecosystem and brand presence across multiple digital channels. The website supports their business by providing an accessible, well-branded e-commerce platform for luxury jewelry. Growth indicators include integration of advanced search (Algolia) and analytics tools, indicating a focus on data-driven customer engagement.

Security posture

The website exhibits a mature security posture with enforced HTTPS, comprehensive security headers, and use of trusted authentication services (Auth0). Privacy compliance is evident through detailed privacy and cookie policies and consent management via OneTrust. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. However, the absence of publicly available security policy or incident response contacts suggests an area for improvement in transparency and readiness. Overall, the security measures align well with industry best practices for e-commerce platforms handling luxury goods.

Recommendations

  1. Publish a dedicated security policy and incident response contact information to enhance transparency and trust.
  2. Regularly audit and update third-party libraries and dependencies to mitigate potential vulnerabilities.
  3. Enhance data retention policy disclosures to improve privacy compliance clarity.
  4. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  5. Maintain continuous monitoring of security headers and SSL configurations to uphold high security standards.

Contact details published on the site

Addresses
Legal name
Sotheby's
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sotheby's
Description
Sotheby's is a premier auction house specializing in luxury goods including fine art, jewelry, and collectibles. The website section analyzed focuses on diamond jewelry available for purchase.
Key services
auction services, luxury jewelry sales, art sales, private sales
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Auth0, Algolia, Segment Analytics, OneTrust
Frameworks
React, Next.js
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of Auth0 for authentication
  • Consent management via OneTrust
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Segment Analytics, Google Optimize
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Segment Analytics, Google Optimize
Marketing tools
Segment, Google Optimize
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well maintained.
  2. Strong brand presence and trust indicators.
  3. Uses modern web technologies and analytics tools.
  4. Privacy and cookie policies are present and GDPR compliant.
  5. No security policy or incident response information publicly found.
  6. WHOIS data is unavailable, which is unusual but not uncommon for large brands using privacy services.
Technical notes

Notes

The website is built on a modern React and Next.js framework, leveraging server-side rendering for performance. Integration with Auth0 provides secure authentication, while Algolia powers efficient product search capabilities. Segment Analytics and Google Optimize support data-driven marketing and user experience optimization. The site is mobile-optimized with responsive design and accessibility considerations. Performance is moderate, likely due to rich content and third-party integrations, but overall user experience is smooth. No CMS was explicitly detected, suggesting a custom or proprietary content management approach. Hosting provider details were not discernible from the provided data.
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

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