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Security report for coin.network

BuySellAds.com, Inc. · Technology · United States

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

71/100

Risk levelMedium

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

Coin.Network is a specialized crypto advertising network operated by BuySellAds.com, Inc., a reputable company established in 2008. The platform targets crypto advertisers and publishers, offering programmatic display ads, native ads, and a self-serve ad buying platform. It holds a strong market position with trusted partnerships from leading crypto brands and serves over 133 million monthly ad impressions. The website is professionally designed, mobile-optimized, and built on the HubSpot CMS platform, reflecting a mature digital infrastructure. Security posture is strong with HTTPS and security headers implemented, though explicit security policies and incident response details are not publicly available. Privacy and cookie policies are comprehensive and GDPR compliant. WHOIS data is unavailable due to TLD limitations, but the association with BuySellAds.com and consistent branding support legitimacy. Overall, Coin.Network presents a trustworthy and professional service in the crypto advertising space.

Scanned

This is an earlier scan of coin.network. 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

4 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"

  2. GDPR outside view

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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  3. 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

  4. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Weak SPF Policy

      SPF record has permissive policy allowing any server to send email

      What to do: Use -all or ~all qualifier for better email security

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

Keep watching coin.network

This scan found 20 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
75
Security headers
55
Email security
70
DNS health
60
Network security
100
GDPR outside view
68
Average
71

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

Coin.Network operates in the technology and finance sectors, focusing on crypto advertising. Its business model revolves around connecting advertisers with niche crypto audiences via curated partner websites. The company leverages a mix of programmatic and native ad formats, supported by a self-serve platform for campaign management. Strategic partnerships with well-known crypto entities enhance its market credibility. The platform's growth is evidenced by its large monthly active user base and ad impressions. The parent company, BuySellAds.com, provides additional stability and brand recognition. The company targets medium to large crypto businesses seeking effective advertising solutions. The ecosystem includes trusted partners and a professional support team, indicating a robust operational model.

Security posture

The website demonstrates a solid security posture with HTTPS enforced and multiple security headers present, reducing common web vulnerabilities. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a published security policy, incident response plan, or vulnerability disclosure program limits transparency. No security contact emails or security.txt files were found. Privacy compliance is well addressed with clear privacy and cookie policies. The overall security maturity is good but could be improved by publishing explicit security governance documents and incident response procedures.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and compliance.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide contact information for security incidents or abuse reporting.
  4. Enhance transparency by listing data protection officer contact details if applicable.
  5. Regularly review and update privacy and cookie policies to maintain GDPR and other compliance.

Contact details published on the site

Addresses
Legal name
BuySellAds.com, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
BuySellAds.com, Inc.
Description
Coin.Network's crypto ad network helps advertisers reach niche, engaged crypto audiences, and publishers monetize their ads through relevant, quality ads.
Key services
Programmatic display ads, Native ads network, Self-serve ad buying platform
Content quality
excellent
Branding
consistent

Technology

Stack
HubSpot CMS, JavaScript, CSS, SVG
Frameworks
HubSpot
Platforms
HubSpot
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Secure forms with minimal data collection

Analytics and tracking

Services
HubSpot Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Coin.Network, BuySellAds
Tracking pixels
HubSpot Analytics
Marketing tools
HubSpot
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. Content is focused on crypto advertising network services.
  3. Strong branding and trust signals from well-known crypto partners.
  4. No explicit security policy or incident response info published.
  5. WHOIS data is unavailable due to TLD limitations, but website affiliation with BuySellAds adds credibility.
  6. Uses HubSpot CMS and analytics, indicating modern infrastructure.
  7. No adult or questionable content detected.
  8. Contact information includes a company email and contact page.
  9. Privacy and cookie policies are present and comprehensive.
Technical notes

Notes

The website is built on HubSpot CMS, utilizing modern web technologies including JavaScript, CSS, and SVG graphics. It is hosted on HubSpot's CDN, ensuring fast content delivery and good performance. The site is mobile-optimized with responsive design and accessibility considerations. SEO is well implemented with proper meta tags and Open Graph data. Analytics are handled via HubSpot Analytics scripts, enabling moderate user tracking. The technical infrastructure is modern and well-maintained, supporting a professional user experience with minimal technical debt. Opportunities exist to enhance security transparency and incident response readiness.
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. 59/100 −10Medium27 findingsView report
  2. 69/100Medium31 findingsView report
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