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Security report for blockchain.com

Blockchain · Internet · United kingdom

Partial score · DNS & email only

75/100

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

Scanned

This is an earlier scan of blockchain.com. View the latest report
3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

GDPR outside view
100/ 100 · Low
Checks completed
4of 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

1 finding rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching blockchain.com

This scan found 4 issues across 2 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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Recommended

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  • 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
Network security
100
GDPR outside view
100
Average
94
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • Email security: did not complete in this scan.
  • DNS health: did not complete in this scan.
  • 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

Blockchain.com operates in the competitive cryptocurrency finance sector, leveraging its brand recognition and user base to maintain a strong market position. Its business model focuses on cryptocurrency exchange and wallet services, generating revenue through transaction fees and value-added services. The platform targets a broad audience including retail investors, traders, and institutional clients. The integration of multiple advertising and analytics platforms suggests a data-driven marketing approach to customer acquisition and retention. The absence of direct contact information on the main site may indicate reliance on digital support channels. The company’s use of privacy protection in domain registration aligns with industry norms for security and confidentiality. Partnerships with major ad networks and analytics providers support its marketing ecosystem.

Security posture

Blockchain.com demonstrates a solid security posture with enforced HTTPS, modern security headers, and a comprehensive cookie consent mechanism that respects user privacy preferences. The site avoids exposing sensitive data in its HTML content and uses reputable third-party services for analytics and marketing. However, the lack of publicly available security policies, incident response contacts, and vulnerability disclosure programs suggests room for maturity in security governance and transparency. The extensive use of third-party scripts necessitates ongoing security audits to mitigate supply chain risks. Overall, the platform appears secure for end users but would benefit from enhanced security communication and formalized incident response procedures.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and controls.
  2. Provide clear incident response contact information, such as a security@ or abuse@ email address.
  3. Implement and publicize a vulnerability disclosure or bug bounty program, including a security.txt file.
  4. Enhance website accessibility to meet higher standards for users with disabilities.
  5. Regularly review and audit third-party scripts and tracking pixels to minimize security risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Blockchain.com
Description
Buy Bitcoin, Ethereum, and other cryptocurrencies on a platform trusted by millions.
Key services
Buy Bitcoin, Buy Ethereum, Cryptocurrency wallet, Swap and trade cryptocurrencies
Content quality
good
Branding
consistent

Technology

Stack
React (implied by _next static chunks), Google Analytics, Hotjar, AppsFlyer, TikTok Pixel, Twitter Ads Pixel, Quora Pixel, Reddit Pixel, Google Tag Manager, Cookiebot
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML
  • Use of modern analytics and tracking with consent

Analytics and tracking

Services
Google Analytics, Hotjar, AppsFlyer
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
AppsFlyer, Google AdSense, Twitter Ads, TikTok Ads, Quora Ads, Reddit Ads
Tracking pixels
Hotjar, AppsFlyer, TikTok Pixel, Twitter Pixel, Quora Pixel, Reddit Pixel
Marketing tools
Cookiebot
Transparency
good

Site quality

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

Key observations

  1. Website uses HTTPS with strong security practices
  2. Comprehensive cookie consent mechanism with detailed cookie categories
  3. Multiple third-party analytics and advertising pixels integrated with consent
  4. No direct contact emails or phone numbers found on main page
  5. Privacy policy and terms of service are present and linked
  6. WHOIS data is not publicly available, indicating privacy protection
  7. Website content is professional and targeted at cryptocurrency users
  8. No WAF or blocking mechanisms detected
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. 85/100Low17 findingsView report
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blockchain.com security report (partial scan) | Guard