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Security report for mementomori.social

Digitoimisto Dude Oy · Technology · Finland

Low risk. 3 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

Mementomori.social is an independent Mastodon social media instance operated by the Finnish digital agency Digitoimisto Dude Oy. It serves as a federated social platform connecting users to the broader Fediverse, emphasizing privacy and open-source values. The platform targets general social media users interested in decentralized social networking without algorithmic interference. Technically, the site runs a modern Mastodon version with React-based UI components, hosted with Cloudflare DNS services, and uses HTTPS with good SSL configuration. The site is moderately performant and mobile-optimized but lacks some advanced SEO and accessibility features. Security posture is solid with HTTPS and domain transfer protections, though DNSSEC is not enabled and no explicit security or incident response policies are published. Privacy compliance is partial, with privacy and terms pages present but no cookie consent mechanism despite usage of a tracking script. Overall, the site is trustworthy and professionally maintained, with a good balance of content quality and technical implementation.

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

3 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

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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
72
Security headers
80
Email security
85
DNS health
75
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 mementomori.social, from OffSeq Breach.

Total records
3
Employees
0
Customers
3
Third parties
0
Weak passwords
0%

1 subdomain 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 mementomori.social.

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

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 in federated social media services. It leverages the Mastodon platform to provide a niche social network for users valuing privacy and open-source principles. The company is small-sized, founded recently in 2022, and backed by Digitoimisto Dude Oy. The business model centers on hosting and community engagement rather than direct monetization. The platform's market position is as a reputable independent Mastodon instance with a loyal user base and active community. Partnerships or subsidiaries are not evident. Growth indicators include active user statistics and integration with the Fediverse. The company maintains transparency with admin contact visibility and open source code links.

Security posture

Security maturity is moderate to high. The site enforces HTTPS and uses clientTransferProhibited domain status to prevent unauthorized transfers. However, DNSSEC is not enabled, which could improve DNS security. No security headers were detected in the HTML content, and there is no published security policy or incident response contact information. The site uses a tracking script without a cookie consent banner, which may pose privacy compliance risks under GDPR. No vulnerabilities or exposed sensitive data were found in the content. Incident response readiness and security culture indicators are not publicly documented. Overall, the security posture is adequate for a social media instance but could be enhanced with additional policies and technical controls.

Recommendations

  1. Enable DNSSEC for the domain to enhance DNS security.
  2. Implement a cookie consent mechanism to comply with GDPR and improve privacy transparency.
  3. Publish a formal security policy and incident response contact information on the website.
  4. Add security headers such as Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security.
  5. Improve accessibility features and SEO optimization for better user experience and discoverability.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Digitoimisto Dude Oy
Description
Mementomori.social is a social media for mortals. We connect with the Fediverse, used by millions. This instance is backed by a Finnish company, digital web agency Digitoimisto Dude Oy.
Key services
Social media hosting, Fediverse connectivity, User profiles, Trending posts
Content quality
good
Branding
consistent

Technology

Stack
Mastodon 4.5.0-alpha.1+mementomods-2025-07-09, Mastodon Bird UI 2.3.1, Cloudflare DNS, JavaScript ES modules, React
Frameworks
Mastodon (Ruby on Rails backend, React frontend)
Platforms
Fediverse
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • clientTransferProhibited domain status
  • No sensitive data exposed in HTML

Analytics and tracking

Services
analytics.dude.fi
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
analytics.dude.fi
Transparency
basic

Site quality

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

Key observations

  1. Website is a Mastodon social media instance focused on the Fediverse.
  2. Content is user-generated posts with social and political topics.
  3. No direct company contact emails or phone numbers found on the page.
  4. Privacy and terms of service pages are present and accessible.
  5. No cookie consent banner detected despite tracking script usage.
  6. Site uses modern JavaScript modules and React-based UI.
  7. No security.txt or explicit security policy found.
  8. No signs of adult or NSFW content.
  9. Domain WHOIS data is consistent and domain is relatively new but appropriate.
Technical notes

Notes

The website is built on a modern Mastodon platform version with React UI components, leveraging ES modules and modern JavaScript. Hosting uses Cloudflare DNS services, providing reliable DNS resolution and some security benefits. The site is mobile-optimized and uses HTTPS with strong SSL configuration. Performance is moderate, with many preloaded scripts and stylesheets indicating a complex frontend. No CMS is detected, as the platform is custom Mastodon software. Technical debt appears low, but improvements in SEO, accessibility, and security headers could enhance the overall infrastructure. The use of a tracking script without consent is a minor technical compliance risk.
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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