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Security report for mastodon.uno

Spaceship, Inc. · Technology · Italy

Low risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

78/100

Risk levelLow

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

Mastodon Uno Social - Italia is a prominent Mastodon instance serving the Italian Mastodon community with a focus on privacy and Open Source values. It is operated by Spaceship, Inc. and hosts a large user base of approximately 77,000 users, positioning itself as the largest Italian Mastodon node. The platform offers federated social networking services leveraging the Mastodon open-source software, providing a decentralized social media experience without ads or algorithms. The website is well-structured, mobile-optimized, and uses modern web technologies including React and ES modules, with hosting infrastructure supported by Cloudflare DNS services. Security posture is solid with HTTPS enforced and domain transfer protections in place, though DNSSEC is not enabled and some security headers are missing. Privacy compliance is partial, with a privacy policy present but lacking cookie consent mechanisms and GDPR explicit indicators. No direct company contact information or incident response policies are published on the site. Overall, the site is trustworthy and professional, serving a niche community with a clear mission and stable technical foundation.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 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. 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

  2. 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
    • High

      Weak SSL Key Length

      SSL certificate uses 384-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

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

Keep watching mastodon.uno

This scan found 19 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.

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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
52
Security headers
80
Email security
90
DNS health
85
Network security
100
GDPR outside view
58
Average
78

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention mastodon.uno, from OffSeq Breach.

Total records
1,274
Employees
5
Customers
1,268
Third parties
1
Weak passwords
10%

Latest record dated 2026-06-05 · 2 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for mastodon.uno.

Select it in the checkout above.

Masked preview

  • –mastodon.uno2026-06-05
  • –mastodon.uno2026-01-10
  • –mastodon.uno2025-08-19
  • –mastodon.uno2025-07-20
  • –mastodon.uno2025-04-19

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

The business operates in the technology sector, specifically within decentralized social networking and federated platforms. Its competitive advantage lies in being the largest Italian Mastodon node with a strong community focus on privacy and environmental values. The business model is community-driven social networking, likely supported by donations or sponsorships rather than traditional advertising. The target audience includes Italian-speaking users interested in privacy-respecting social media and Open Source software. The company benefits from open-source software and a transparent operational model. Partnerships or subsidiaries are not evident from the data. Growth indicators include a substantial active user base and ongoing platform updates. The ecosystem includes links to other Mastodon instances and federated social networks, enhancing reach and interoperability.

Security posture

The security maturity level is moderate to good. HTTPS is properly implemented, and domain registration includes clientTransferProhibited status to prevent unauthorized transfers. However, DNSSEC is not enabled, which could improve DNS security. No security headers such as Content Security Policy or HSTS were detected in the provided data. There is no published security policy or incident response contact information, which limits transparency in handling security incidents. No vulnerabilities or exposed sensitive data were found in the HTML content. The absence of cookie consent mechanisms may pose compliance risks under GDPR. Overall, the platform demonstrates a reasonable security posture but could enhance protections and transparency to improve trust and compliance.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement and publish a comprehensive security policy including incident response procedures and contact channels.
  3. Add cookie consent mechanisms to comply with GDPR and improve user privacy transparency.
  4. Include security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Content-Type-Options to harden security posture.
  5. Publish clear contact information for data protection officer or security team to improve trust and compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Spaceship, Inc.
Description
Mastodon.Uno è la principale comunità mastodon italiana. Con 77.000 iscritti è il più grande nodo Mastodon italiano: anima ambientalista a supporto della privacy e del mondo Open Source.
Key services
Mastodon social networking, Federated social media platform
Content quality
good
Branding
consistent

Technology

Stack
Mastodon 4.4.1, React, JavaScript ES modules, Cloudflare DNS
Frameworks
Ruby on Rails (implied by Mastodon)
Platforms
Fediverse, Mastodon
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • clientTransferProhibited domain status

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 a Mastodon instance focused on Italian community and privacy/Open Source values.
  2. Content is accessible and not blocked by WAF or security challenges.
  3. No explicit privacy or cookie consent mechanisms detected despite GDPR relevance.
  4. WHOIS data is transparent and consistent with business claims.
  5. No direct company contact emails or phone numbers found on the page.
  6. No security.txt or vulnerability disclosure policy found.
  7. Site uses modern JavaScript modules and React-based frontend.
  8. No advertising or tracking scripts detected in the provided HTML.
Technical notes

Notes

The website uses Mastodon version 4.4.1, a modern open-source federated social network platform built on Ruby on Rails with a React frontend. The site loads multiple JavaScript ES modules and uses Cloudflare for DNS resolution. Performance is moderate with good mobile optimization and basic accessibility features. SEO is supported by proper meta tags and Open Graph data. No CMS is detected, indicating a custom or framework-based implementation. The site lacks some advanced security headers and cookie consent mechanisms, which are areas for technical improvement. The domain is registered with Spaceship, Inc. since 2019, consistent with the platform's maturity. Overall, the technical infrastructure is solid but could benefit from enhanced 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

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