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Security report for denner.ch

Denner AG · Retail · Switzerland

Low risk. 2 critical or high findings in SSL/TLS.

Security score

83/100

Risk levelLow

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

Denner AG operates as a leading discount grocery retailer in Switzerland, offering a wide range of affordable food, beverages, and promotional products including an online wine shop. The website is professionally designed with consistent branding and targets general consumers seeking quality and value in grocery shopping. The company maintains a strong digital presence with active social media channels and structured data enhancing search visibility. Technically, the site leverages modern JavaScript frameworks such as Nuxt.js, integrates marketing and analytics tools like Google Tag Manager and Kameleoon, and implements cookie consent mechanisms for privacy compliance. Security posture is robust with HTTPS enforcement and comprehensive security headers, though explicit security policies and vulnerability disclosures are absent. Overall, the domain registration data aligns well with the business identity, supporting legitimacy and trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
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

2 findings rated critical or high. Fix these first.

  1. 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

      SSL Certificate Expires Soon

      SSL certificate expires in 20 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

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

Keep watching denner.ch

This scan found 16 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

Email alerts on material changes and an exportable JSON history of every change.

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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
57
Security headers
85
Email security
80
DNS health
85
Network security
100
GDPR outside view
88
Average
83

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

Denner AG holds a significant market position as a discount retailer in the Swiss grocery sector, focusing on competitive pricing and quality products. The business model centers on retail sales both in physical stores and online, with a notable emphasis on promotional campaigns and a specialized wine shop. The company targets a broad consumer base in Switzerland, leveraging digital marketing and social media to engage customers. While no parent or subsidiary companies are identified, the brand demonstrates consistent messaging and trust signals such as verified contact information and social media presence. Growth potential is supported by digital maturity and integration of marketing technologies.

Security posture

The website exhibits a mature security posture with enforced HTTPS, presence of key security headers (CSP, HSTS, X-Frame-Options, etc.), and a cookie consent mechanism aligned with GDPR requirements. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. However, the absence of a published security policy, incident response contacts, or vulnerability disclosure program indicates room for improvement in transparency and readiness. Compliance with GDPR is partially evidenced by cookie consent but lacks explicit privacy policy visibility in the provided content. Overall, the security measures are adequate for a retail e-commerce platform but could be enhanced with formalized policies and disclosure channels.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service accessible from the website footer.
  2. Implement and publicize a formal security policy and incident response contact information.
  3. Add a vulnerability disclosure or security.txt file to encourage responsible reporting.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Increase transparency on GDPR compliance by detailing data retention and user rights.

Contact details published on the site

Addresses
Legal name
Denner AG
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Denner AG
Description
Ihr Discounter in der Schweiz für günstige Lebensmittel, Getränke und Aktionen. Finden Sie alles, was Sie brauchen – Qualität, Frische und unschlagbare Preise.
Key services
Discount grocery retail, Online wine shop, Promotional offers
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Vue.js (implied by Nuxt.js usage), Nuxt.js, Google Tag Manager, Kameleoon (A/B testing), OneTrust (cookie consent)
Frameworks
Nuxt.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Kameleoon
Tracking pixels
OneTrust
Marketing tools
Kameleoon, OneTrust
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Strong presence of cookie consent and privacy mechanisms.
  3. No explicit privacy policy or terms of service links found in the provided content.
  4. Comprehensive structured data for organization and website present.
  5. Multiple social media channels linked, indicating active digital presence.
  6. Use of modern JavaScript frameworks and marketing tools.
  7. Security headers and HTTPS are properly implemented.
  8. No signs of suspicious or malicious content.
Technical notes

Notes

The website is built on a modern JavaScript framework (Nuxt.js) with server-side rendering capabilities, improving SEO and performance. Integration of Google Tag Manager and Kameleoon indicates advanced marketing and A/B testing capabilities. Cookie consent is managed via OneTrust, supporting regulatory compliance. The site demonstrates good mobile optimization and SEO practices, though performance is moderate, suggesting potential for further optimization. No CMS was explicitly detected, implying a custom or headless architecture. Hosting provider details are not evident from the content. Overall, the technical infrastructure supports a scalable and user-friendly retail platform with opportunities for performance tuning and enhanced accessibility.
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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