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Security report for bonn.social

Bonn.digital · Technology · Germany

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

Bonn.social is a localized Mastodon social media instance serving the Bonn and Rhein-Sieg region, operated by Bonn.digital, a social media agency based in Bonn, Germany. The platform provides decentralized social networking services tailored to the local community and enthusiasts of the region. The website is well-structured, with clear information about administration, contact, and community guidelines, fostering trust and engagement among users. Technically, the site leverages modern web technologies including Mastodon, React, and ES modules, ensuring a responsive and user-friendly experience across devices. The platform is integrated into the Fediverse, promoting decentralized social media interaction. Security-wise, the site enforces HTTPS and avoids exposing sensitive data, but lacks some security headers and a cookie consent mechanism, which are recommended for enhanced protection and compliance. WHOIS data is privacy protected, which is common for such services, but limits transparency. Overall, the site demonstrates a solid security posture and business credibility appropriate for its scope and audience.

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

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

Keep watching bonn.social

This scan found 18 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
72
Security headers
80
Email security
70
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 bonn.social, from OffSeq Breach.

Total records
17
Employees
0
Customers
17
Third parties
0
Weak passwords
12%

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 bonn.social.

Select it in the checkout above.

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

Bonn.digital operates bonn.social as a regional Mastodon instance, positioning itself as a community-focused social media platform within the decentralized Fediverse ecosystem. The business model centers on providing social media hosting and community management services, supported by financial contributions from users. The target audience includes residents and enthusiasts of Bonn and the Rhein-Sieg area, as well as Mastodon users seeking a local community. The company leverages its expertise as a social media agency to maintain and moderate the platform, enhancing its competitive advantage in the local market. The partnership ecosystem includes links to Mastodon official resources and status monitoring services. Growth indicators include an active user base of over 400 monthly users. Strategic observations suggest opportunities to expand services and improve compliance features to strengthen market position.

Security posture

The security maturity of bonn.social is moderate to good. The site enforces HTTPS, ensuring encrypted communications, and avoids exposing sensitive information in its HTML content. However, the absence of key security headers such as Content-Security-Policy and X-Frame-Options represents a gap that could be exploited in certain attack scenarios. The lack of a cookie consent mechanism may pose compliance risks under GDPR. No vulnerability disclosures or incident response policies are publicly available, which could impact incident handling readiness. The WHOIS privacy protection is justified but reduces transparency. Overall, the platform maintains a secure baseline suitable for its community service role but would benefit from enhanced security controls and documented policies.

Recommendations

  1. Implement standard security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to improve defense-in-depth.
  2. Add a cookie consent banner or mechanism to comply with GDPR and enhance user privacy transparency.
  3. Publish a clear security policy and incident response contact information to improve trust and readiness.
  4. Regularly audit third-party libraries and dependencies to ensure no vulnerabilities are introduced.
  5. Consider publishing terms of service to clarify user rights and responsibilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bonn.digital
Description
Bonn.social ist eine Mastodon-Instanz für Bonn, Rhein-Sieg und für alle, die Bonn und die Region mögen. Diese Instanz wird von Bonn.digital, einer Social-Media-Agentur aus Bonn betrieben.
Key services
Mastodon social media hosting, Community moderation, Social media agency services (Bonn.digital)
Content quality
good
Branding
consistent

Technology

Stack
Mastodon, Ruby on Rails, React, Webpack, JavaScript ES Modules
Frameworks
Mastodon, React
Platforms
Fediverse
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

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

Analytics and tracking

Tracking level
minimal
Privacy practices
good

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 for Bonn and Rhein-Sieg region.
  2. Operated by Bonn.digital, a social media agency.
  3. Clear contact email provided.
  4. No visible security headers in HTML response.
  5. No cookie consent mechanism detected.
  6. No terms of service page found.
  7. WHOIS data is privacy protected and registrar info is limited.
  8. Website uses modern web technologies and is mobile optimized.
  9. No advertising or tracking scripts detected.
  10. Content is safe and suitable for general audiences.
Technical notes

Notes

The website is built on the Mastodon platform, utilizing Ruby on Rails backend and React frontend technologies. It employs modern JavaScript ES modules and Webpack for asset bundling. The site is mobile optimized and provides a responsive user interface. Performance is moderate with no significant delays detected. SEO is supported by proper meta tags and Open Graph data. Accessibility is basic but present. Hosting provider details are not explicitly disclosed. The site does not use a traditional CMS but relies on Mastodon's built-in content management. Technical risks include missing security headers and lack of cookie consent, which could affect compliance and security posture.
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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