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Security report for masto.host

Masto.host · Technology · N/a

Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

54/100

Risk levelMedium

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

Masto.host is a specialized service provider offering fully managed Mastodon hosting solutions. Founded in 2017, the company targets individuals and organizations seeking an easy and secure way to run Mastodon instances without the complexity of self-hosting. Their business model is subscription-based, with plans starting at $6 per month, emphasizing managed installation, security, and upgrades. The website reflects a focused niche market position with clear service offerings and positive user testimonials, indicating a trusted presence in the Mastodon hosting ecosystem. Technically, the website is built using modern static site generation technology (Eleventy), delivering fast performance and good mobile optimization. The absence of heavy scripts or analytics tools suggests a privacy-conscious approach. However, the site lacks some advanced security headers and cookie consent mechanisms, which could be improved to enhance compliance and security posture. From a security perspective, the site enforces HTTPS and uses domain status protections but does not enable DNSSEC or publish a security policy or incident response contacts. No vulnerabilities or exposed sensitive data were detected in the content. Overall, the security posture is solid but could benefit from additional hardening and transparency. The overall risk assessment is low, with no critical issues found. Strategic recommendations include enabling DNSSEC, implementing security headers, adding cookie consent for privacy compliance, and publishing a security policy. These steps will improve trust, compliance, and resilience against potential threats.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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. 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';…

  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

    • 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 masto.host

This scan found 23 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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Full report

€39.90one-time

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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
72
Security headers
25
Email security
72
DNS health
80
Network security
20
GDPR outside view
53
Average
54

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

Masto.host operates in the technology sector, focusing on managed Mastodon hosting services. Their competitive advantage lies in simplifying Mastodon instance management, appealing to users who want to avoid technical complexities. Revenue is generated through subscription plans, with flexibility to upgrade or downgrade. The target customers include Mastodon users, communities, and organizations seeking reliable hosting. The company maintains a small size with a consistent brand and positive user feedback. Partnerships or subsidiaries are not evident, indicating a focused standalone operation. Growth indicators include a stable domain age and active user testimonials. The business ecosystem is niche but well-defined, with strategic emphasis on ease of use and managed services.

Security posture

The security maturity level of Masto.host is moderate to good. The website uses HTTPS exclusively, ensuring encrypted communications. Domain registration includes clientTransferProhibited status, reducing risk of unauthorized transfers. However, DNSSEC is not enabled, which is a recommended best practice for DNS security. The absence of security headers such as Content-Security-Policy and X-Frame-Options reduces protection against certain web attacks. No incident response or security policy is published, limiting transparency in handling security events. No vulnerabilities or exposed sensitive data were found in the site content. GDPR compliance is partial, with privacy and terms of service pages present but no cookie consent mechanism. Overall, the security posture is adequate for the business scale but can be improved with additional controls and policies.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement standard security headers (Content-Security-Policy, X-Frame-Options, X-Content-Type-Options) to mitigate common web vulnerabilities.
  3. Add a cookie consent banner or mechanism to comply with privacy regulations such as GDPR.
  4. Publish a formal security policy and incident response contact information to improve transparency and trust.
  5. Consider adding analytics with privacy-respecting configurations to better understand user behavior while maintaining compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Masto.host
Description
Masto.host provides fully managed Mastodon hosting services, making it easy to run Mastodon instances with hosting, installation, security, and upgrades handled.
Key services
Mastodon server hosting, Installation and setup, Security management, Automatic upgrades
Content quality
good
Branding
consistent

Technology

Stack
Eleventy v2.0.1, Font Awesome Pro 6.4.0, Poppins font, SVG graphics
Frameworks
Eleventy (Static Site Generator)
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Domain status clientTransferProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is focused on managed Mastodon hosting services.
  3. Clear business contact email provided.
  4. No phone numbers or physical addresses found.
  5. No cookie consent or explicit privacy compliance mechanisms detected.
  6. No security.txt or vulnerability disclosure policy found.
  7. No security headers detected in the HTML content.
  8. Website uses modern static site generation technology (Eleventy).
  9. No analytics or tracking scripts detected.
  10. Strong trust indicators from testimonials and clear service descriptions.
Technical notes

Notes

The website is built using Eleventy, a modern static site generator, which contributes to fast loading times and good performance. The use of SVG graphics and web fonts (Poppins) enhances visual quality and branding consistency. The site is mobile optimized and accessible at a basic level, with clear navigation and structured content. Hosting appears to be managed with custom name servers under the masto.host domain, indicating control over infrastructure. No CMS or heavy JavaScript frameworks are detected, reducing attack surface and technical debt. The absence of analytics or tracking scripts suggests a privacy-focused approach but limits data-driven insights. Overall, the technical implementation is modern, efficient, and well-suited for the service offered.
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. 54/100Medium31 findingsView report
  2. 54/100 −13Medium31 findingsView report
  3. 67/100Medium25 findingsView report
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