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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. Their business model is subscription-based, targeting individuals and organizations who want to run Mastodon instances without the complexity of server management. The website presents a professional and consistent brand image with clear service descriptions and user testimonials that enhance trust. Technically, the site is built using the Eleventy static site generator, employs modern web fonts, and uses SVG graphics for branding. The site is performant, mobile-optimized, and SEO-friendly, though accessibility features are basic. From a security perspective, the website enforces HTTPS and avoids exposing sensitive data or vulnerable libraries. However, it lacks explicit security headers and a published security or incident response policy. No cookie consent mechanism or tracking scripts were detected, indicating a minimal user tracking approach but also a lack of compliance with cookie regulations. WHOIS data is consistent and transparent, supporting the legitimacy of the domain and business. Overall, Masto.host demonstrates a solid digital maturity with a good security posture and trustworthy business presence. The main areas for improvement include enhancing privacy compliance with cookie consent, publishing security policies, and implementing additional security headers to strengthen defenses. These steps will improve user trust and regulatory compliance while maintaining the service's niche market position.

Scanned

This is an earlier scan of masto.host. View the latest report

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

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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
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 occupies a niche market as a fully managed Mastodon hosting provider, leveraging the growing interest in decentralized social media. Their subscription model starting at $6/month is competitive and accessible, appealing to both individuals and small organizations. The presence of testimonials from recognized users and communities indicates a positive reputation and customer satisfaction. The company focuses on ease of use, handling installation, upgrades, and security, which differentiates it from self-hosted or unmanaged solutions. The lack of physical address or phone contact suggests a lean operation, likely remote or small team-based. The ecosystem includes integration with Mastodon and Fediverse communities, enhancing their market relevance. No partnerships or subsidiaries were identified, indicating an independent operation.

Security posture

The security posture of Masto.host is generally good, with HTTPS enforced and no visible exposure of sensitive data or vulnerable components. However, the absence of key security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces the overall security hardening. The lack of a published security policy or incident response contact channels limits transparency and preparedness communication. No vulnerability disclosure or security.txt files were found, which could hinder responsible vulnerability reporting. The minimal tracking and absence of cookie consent mechanisms suggest a privacy-conscious approach but also a compliance gap with cookie laws. Overall, the site is secure but could benefit from enhanced security best practices and compliance documentation.

Recommendations

  1. Implement and publish a comprehensive security policy including incident response procedures.
  2. Add explicit security headers such as CSP, HSTS, and X-Frame-Options to improve security posture.
  3. Introduce a cookie consent mechanism to comply with privacy regulations and enhance user trust.
  4. Publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Enhance accessibility features to improve inclusivity and compliance with standards.
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 a Mastodon instance with hosting, installation, security, and upgrades handled.
Key services
Managed Mastodon hosting, Installation and upgrades, Security management, Domain/subdomain support
Content quality
good
Branding
consistent

Technology

Stack
Eleventy v2.0.1, Font Awesome Pro 6.4.0, CSS, SVG graphics
Frameworks
Eleventy
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No visible exposed sensitive data
  • No vulnerable libraries detected

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 Mastodon hosting with clear service descriptions.
  3. No forms detected on the homepage; subscription and login handled via separate pages.
  4. Contact is primarily via a company email address.
  5. No phone numbers or physical addresses found.
  6. No cookie consent or tracking scripts detected.
  7. No security.txt or vulnerability disclosure information found.
  8. Good use of Open Graph and Twitter meta tags for social sharing.
  9. No analytics or marketing tracking scripts detected.
  10. Site uses Eleventy static site generator and modern web fonts.
Technical notes

Notes

The website is built using the Eleventy static site generator, which contributes to fast loading times and good performance. The use of modern web fonts and SVG graphics enhances visual quality and branding consistency. The site is mobile-optimized and SEO-friendly with proper meta tags including Open Graph and Twitter cards. No CMS or dynamic backend was detected, reducing attack surface and complexity. The absence of analytics or marketing scripts indicates minimal data collection, aligning with privacy-conscious design. However, the lack of explicit security headers and cookie consent mechanisms are technical gaps. Hosting provider details are not disclosed, which could be relevant for deeper infrastructure assessment. Overall, the technical implementation is modern and efficient but could be improved with additional security and privacy features.
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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