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Security report for t-online.de

Ströer Digital Publishing GmbH · Media · Germany

Medium risk. 5 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

70/100

Risk levelMedium

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

t-online.de is a leading German digital media platform operated by Ströer Digital Publishing GmbH, offering comprehensive news coverage, email services, and shopping options. The website targets a broad German-speaking audience with a focus on politics, sports, entertainment, and lifestyle content. It maintains a strong market position as a major news outlet with multiple regional subsidiaries. Technically, the site leverages modern web technologies including Next.js and React, ensuring fast performance and excellent mobile optimization. The infrastructure is supported by Deutsche Telekom AG, indicating robust hosting and DNS management. Security posture is strong with HTTPS enforcement, comprehensive security headers, and consent management for GDPR compliance. However, explicit security policies and incident response contacts are not publicly disclosed, representing an area for improvement. Overall, the site demonstrates high professionalism, trustworthiness, and compliance with privacy regulations, making it a reliable source for users and advertisers alike.

Scanned

This is an earlier scan of t-online.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
45/ 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. 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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

  3. 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 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 t-online.de

This scan found 19 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
80
Security headers
70
Email security
60
DNS health
65
Network security
100
GDPR outside view
45
Average
70

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 t-online.de, from OffSeq Breach.

Total records
1,585,328
Employees
21,733
Customers
17,048
Third parties
1,546,547
Weak passwords
18%

Latest record dated 2026-06-20 · 390 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 t-online.de.

Select it in the checkout above.

Masked preview

  • –secureimap.t-online.de2026-06-20
  • –securesmtp.t-online.de2026-06-20
  • –secureimap.t-online.de2026-06-20
  • –securesmtp.t-online.de2026-06-20
  • –securesmtp.t-online.de2026-06-19

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 business operates primarily in the media and telecommunications sectors, focusing on digital publishing and online services. Its revenue streams likely include advertising, email services, and e-commerce. The company benefits from a well-established brand and a broad user base in Germany. Strategic partnerships with Deutsche Telekom and use of advanced consent management tools reflect a mature digital ecosystem. The presence of regional subsidiaries supports localized content delivery and market penetration. The company’s competitive advantage lies in its integrated service offerings and strong brand recognition. Growth indicators include continuous technology adoption and compliance with evolving privacy laws. The partnership ecosystem includes advertising networks like Stroeer and tracking services, enhancing monetization capabilities.

Security posture

The website exhibits a mature security posture with enforced HTTPS, modern security headers, and GDPR-compliant consent mechanisms. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. The use of Sourcepoint and Contentpass for consent management indicates adherence to privacy best practices. However, the absence of a publicly available security policy or vulnerability disclosure program limits transparency. Incident response readiness and direct security contact channels are not evident, which could delay response to security incidents. Overall, the site is secure for general users but could enhance trust by publishing explicit security governance documents and providing clear incident reporting mechanisms.

Recommendations

  1. Publish a dedicated security policy page detailing security frameworks and practices.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide direct security incident contact channels such as security@ or abuse@ emails.
  4. Regularly audit and update third-party scripts to mitigate potential vulnerabilities.
  5. Enhance transparency by listing any security certifications or compliance attestations.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Ströer Digital Publishing GmbH
Description
Aktuelle News aus Politik, Sport, Unterhaltung, Wirtschaft & Finanzen | Ratgeber Leben, Gesundheit und Heim & Garten | E-Mail und Shopping bei t-online.
Key services
News publishing, Email services, Shopping platform, Digital advertising
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, JSON-LD, Sourcepoint Consent Management, Google Tag Manager, IVW Tracking, Contentpass, Stroeer Video Player
Frameworks
Next.js
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Consent management implemented
  • No exposed sensitive data in HTML
  • Secure cookie handling observed

Analytics and tracking

Services
IVW, Google Tag Manager, SpeedCurve Lux
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Stroeer, Nativendo
Tracking pixels
IVW, Sourcepoint Consent
Marketing tools
Sourcepoint Consent Management, Contentpass
Transparency
good

Site quality

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

Key observations

  1. Website is a major German news and digital service platform.
  2. Strong compliance with GDPR and cookie consent regulations.
  3. Uses modern web technologies and frameworks.
  4. No signs of malicious or suspicious content.
  5. Comprehensive social media presence and verified accounts.
  6. No direct security policy or incident response contact found publicly.
  7. Advertising and tracking practices are transparent and consent-based.
Technical notes

Notes

The website employs a modern technology stack centered around React and Next.js, enabling server-side rendering and fast client-side interactivity. It integrates advanced consent management solutions and analytics tools, ensuring compliance and performance monitoring. Hosting is managed by Deutsche Telekom AG, providing reliable infrastructure. Performance is optimized with preloading of critical assets and responsive design for mobile devices. The site uses structured data (JSON-LD) for SEO and social media integration. Technical risks are minimal, but continuous monitoring of third-party scripts and dependencies is recommended to avoid supply chain vulnerabilities. The site demonstrates low technical debt and good modernization practices.
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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