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Security report for uni-hannover.de

Leibniz Universität Hannover · Education · Germany

Medium risk. 4 critical or high findings in GDPR outside view and Security headers.

Security score

61/100

Risk levelMedium

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

Leibniz Universität Hannover is a prominent German technical university offering a wide range of academic programs and research opportunities. The website serves as a comprehensive portal for students, researchers, faculty, and the public, providing detailed information about faculties, research clusters, events, and international collaborations. The university holds a strong market position in education and research, supported by recognized excellence clusters and certifications. Technically, the site is built on TYPO3 CMS with modern frontend technologies and uses Matomo for analytics, emphasizing privacy by disabling cookies. However, the security posture is weakened by the absence of a valid SSL certificate and disabled TLS protocols, which is a critical issue for user trust and data protection. Privacy compliance is generally good with a clear privacy policy, but the lack of a cookie consent mechanism is a gap. Overall, the website is professional, content-rich, and trustworthy but requires urgent improvements in SSL/TLS configuration to enhance security.

Scanned

This is an earlier scan of uni-hannover.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
18/ 100 · Critical
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. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

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

Keep watching uni-hannover.de

This scan found 14 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
50
Security headers
60
Email security
50
DNS health
90
Network security
100
GDPR outside view
18
Average
61

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 uni-hannover.de, from OffSeq Breach.

Total records
7,805
Employees
412
Customers
6,400
Third parties
993
Weak passwords
9%

Latest record dated 2026-06-17 · 270 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 uni-hannover.de.

Select it in the checkout above.

Masked preview

  • –ikg.uni-hannover.de2026-06-17
  • –sso.idm.uni-hannover.de2026-06-15
  • –sogo.stud.uni-hannover.de2026-06-13
  • –sogo.stud.uni-hannover.de2026-06-12
  • –uni-hannover.de2026-06-12

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 university operates as a public educational institution with a broad target audience including prospective and current students, researchers, and alumni. It leverages partnerships with other academic institutions and participates in European university alliances. The business model focuses on education, research excellence, and technology transfer. The presence of multiple faculties and research clusters indicates a diversified academic portfolio. The website's extensive content and external links demonstrate a mature digital presence. The use of Matomo analytics with privacy considerations suggests a responsible approach to data collection. The lack of direct contact emails or phone numbers on the main page may indicate a preference for centralized contact forms and social media engagement.

Security posture

The website implements several important security headers such as HSTS, X-Frame-Options, and X-Content-Type-Options, which are positive indicators. However, the SSL certificate is invalid or missing, and no TLS protocols are enabled, which severely undermines secure communications. The absence of OCSP stapling and session resumption further weakens the SSL/TLS configuration. No known vulnerabilities or malware indicators were detected in the content. The site lacks a published security policy or incident response contacts, which could be improved to enhance transparency and readiness. Overall, the security posture is moderate but requires immediate attention to SSL/TLS issues to protect user data and maintain trust.

Recommendations

  1. Obtain and properly configure a valid SSL/TLS certificate to enable HTTPS with TLS 1.2 and 1.3 protocols.
  2. Enable HSTS with includeSubDomains and preload options to enforce secure connections.
  3. Implement OCSP stapling and session resumption to improve SSL performance and security.
  4. Add a cookie consent mechanism to comply with privacy regulations and improve user transparency.
  5. Publish a clear security policy and incident response contact information to enhance trust and preparedness.
Technical notes

Notes

The website is hosted on an Apache server and uses TYPO3 CMS, a robust and widely used content management system. Frontend technologies include jQuery UI and Owl Carousel for UI components and sliders. The site is multilingual with German as the primary language and English alternatives. Performance data is not available, but the site appears moderately optimized with lazy loading images and responsive design. Accessibility features such as ARIA labels and keyboard navigation are present. SEO is supported by meta tags, canonical links, and structured navigation. The hosting provider appears to be DFN based on MX records. The site uses Matomo analytics with disabled cookies, reflecting a privacy-conscious approach. However, the lack of a valid SSL certificate and disabled TLS protocols represent significant technical risks.
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

Earlier scans of this domain

  1. 64/100Medium32 findingsView report
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