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Security report for kurzelinks.de

Technology · Germany

Medium risk. 5 critical or high findings in GDPR outside view and SSL/TLS.

Security score

66/100

Risk levelMedium

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

Kurzelinks.de is a German-based URL shortening and QR code generation service emphasizing privacy and security. The platform offers a variety of features including multilinks, email links, password protection, link expiration, and deactivation capabilities. It operates with a focus on data protection, malware and phishing scanning, and user control over shortened URLs. The website is primarily in German and targets a general audience seeking secure and privacy-friendly link management solutions. Technically, the site uses a traditional jQuery-based stack with custom JavaScript and CSS, delivering moderate performance and basic mobile optimization. Security posture is solid with HTTPS enforcement and privacy features like referrer removal, though it lacks some advanced security headers and explicit security policies. Contact is primarily via a contact form and an abuse email address, with no direct phone numbers or social media links evident. Overall, the site is trustworthy, professional, and well-aligned with GDPR requirements, though it could improve cookie consent and security header implementation.

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

5 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
    • High

      Weak SSL Key Length

      SSL certificate uses 256-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 kurzelinks.de

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

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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
85
Email security
70
DNS health
60
Network security
100
GDPR outside view
28
Average
66

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

Kurzelinks.de positions itself as a privacy-conscious URL shortener in the competitive link management market. Its key differentiators include malware and phishing protection, password-protected links, and detailed link management options such as multilinks and expiration controls. The business model likely revolves around providing free basic services with potential paid enterprise or API offerings. The target customers are individuals and businesses in Germany and possibly wider German-speaking regions who value privacy and security. The platform's ecosystem includes browser extensions, mobile apps, and API access, indicating a mature service offering. No evident partnerships or subsidiaries were found. The company maintains a lean operation with a small team, focusing on technical robustness and compliance.

Security posture

The website demonstrates a good security maturity level with enforced HTTPS, malware and phishing scanning, and privacy features like referrer removal and password protection for links. However, it lacks explicit security headers such as Content-Security-Policy and X-Frame-Options, which could enhance protection against common web attacks. There is no published security policy or vulnerability disclosure program, which limits transparency for security researchers. Incident response is partially addressed via an abuse contact email. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. GDPR compliance is evident through privacy policy and data protection measures, but cookie consent mechanisms are missing. Overall, the security posture is solid but could benefit from formalized policies and enhanced HTTP security headers.

Recommendations

  1. Implement a cookie consent banner to comply fully with GDPR cookie regulations.
  2. Add and configure security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Publish a formal security policy and vulnerability disclosure program to improve transparency and trust.
  4. Provide explicit security contact information beyond abuse reporting for incident response.
  5. Enhance mobile optimization and accessibility to improve user experience across devices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
kurzelinks.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, Link lists (multilinks), Email links, Password protection for links, Link expiration and access limits, Deactivation links, API access, Browser extension, 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
80/100
Good practices seen
  • HTTPS enforced
  • Referrer removal (Dereferrer function)
  • Password protection for links
  • Malware and phishing scanning of shortened URLs
  • Deactivation links for URL control

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 privacy-focused URL shortener with additional QR code and link list services.
  2. Operated from Germany with German language content.
  3. No signs of malicious or adult content.
  4. No explicit phone or email contact found on main page; contact form and abuse reporting page exist.
  5. No cookie consent banner detected despite GDPR relevance.
  6. No security.txt or vulnerability disclosure policy found.
  7. Good use of HTTPS and security features like referrer removal and password protection.
  8. No advertising or tracking scripts detected.
  9. Technical stack is based on jQuery and custom JavaScript.
  10. WHOIS data is minimal but consistent with hosting provider.
Technical notes

Notes

The website uses a classic jQuery-based frontend stack with multiple JavaScript libraries including jQuery UI and timepicker plugins. The HTML is well-structured with proper meta tags for SEO and viewport settings. Performance is moderate, with no heavy frameworks detected. The site lacks a CMS, indicating a custom-built solution. Hosting appears to be with a German provider (Antagus) consistent with the site's origin. Accessibility and mobile optimization are basic but functional. There is room for modernization by adopting more current frontend frameworks and improving responsive design. No major technical debt or risks were identified, but security header implementation and cookie management could be improved.
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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