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Security report for 0cn.de

Technology · Germany

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

Security score

69/100

Risk levelMedium

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

0cn.de is a German-based URL shortening and QR code generation service focused on privacy and security. It offers features such as malware and phishing link checks, password protection, link expiration, and deactivation links. The service targets general users seeking secure and privacy-friendly short URLs. The website is professionally designed with clear navigation and good content relevance. Technically, it uses a custom platform with jQuery and JavaScript libraries, delivering moderate performance and basic mobile optimization. Security posture is strong with HTTPS enforcement and link safety features, though some security headers and explicit policies are missing. Privacy compliance is good with a comprehensive privacy policy but lacks a cookie consent mechanism. Business credibility is supported by consistent WHOIS data and transparent service offerings.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 100 · High
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.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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 0cn.de

This scan found 22 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
85
Email security
70
DNS health
60
Network security
100
GDPR outside view
28
Average
69

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 0cn.de, from OffSeq Breach.

No leaked records found

Breach holds no records for 0cn.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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 company operates in the technology sector providing URL shortening and QR code services with a niche focus on security and privacy. It leverages partnerships with related shortener domains to expand reach. The business model is service-based, offering free and potentially premium features via API and apps. Target customers include individuals and businesses requiring secure short links. Growth indicators include multi-domain presence and API offerings. The company maintains a privacy-friendly stance and malware protection as competitive advantages.

Security posture

The website enforces HTTPS and implements malware and phishing detection on links, enhancing user safety. Password protection and link expiration features add layers of security. However, the absence of security headers like CSP and a formal vulnerability disclosure policy are gaps. Incident response is facilitated via an abuse reporting page. No exposed sensitive data or vulnerable libraries were detected. Overall, the security maturity is good but could be improved with formal policies and headers.

Recommendations

  1. Implement security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Add a cookie consent banner and explicit cookie policy to improve privacy compliance and user transparency.
  3. Publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Provide contact information for a Data Protection Officer or privacy contact to strengthen GDPR compliance.
  5. Enhance mobile optimization and accessibility features to improve user experience across devices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
0cn.de kürzt lange Links zu Kurz-URLs. Die Kurzlinks sind dank Dereferrer Funktion sowie Malware-, Phishing- und optionalem Passwortschutz sicher.
Key services
URL shortening, QR code generation, Multilink creation, Email link creation, Password protection for links, Link expiration and access limits, API access, Browser extension and mobile app
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.7.1, jQuery Migrate 3.5.2, jQuery UI 1.14.1, JavaScript, CSS, HTML5
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Referrer removal (Dereferrer function)
  • Malware and phishing link scanning
  • Password protection for short links
  • Link expiration and max clicks
  • Deactivation link for URL disabling

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 German-based URL shortener with security and privacy features.
  2. No WAF or blocking detected; full content accessible.
  3. No explicit contact emails or phone numbers found in HTML; contact via contact page.
  4. No cookie consent banner or explicit cookie policy found.
  5. Security best practices partially implemented; HTTPS enforced and malware/phishing checks present.
  6. No security.txt or vulnerability disclosure policy found.
  7. No social media links detected.
  8. Multiple related domains for URL shortening services are linked and promoted.
  9. No advertising or tracking scripts detected.
  10. Website content is professional, well-structured, and relevant to its service.
Technical notes

Notes

The website uses a custom-built platform with jQuery and related JavaScript libraries for UI and interaction. CSS and JavaScript assets are served from the same domain, indicating centralized hosting. Performance is moderate with no major blocking scripts detected. SEO is supported by meta tags and structured navigation. Accessibility is basic with some ARIA labels present. There is no indication of a CMS or third-party hosting provider. The technical stack is modern but could benefit from updated frameworks and enhanced mobile responsiveness.
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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