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Security report for plussa.fi

Kesko · Retail · Finland

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

Security score

61/100

Risk levelMedium

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

K-Plussa is a comprehensive loyalty program operated by Kesko, a major Finnish retail company. The website serves as a portal for members to access personalized offers, manage their membership, and learn about benefits across a wide network of retail and service partners. The program targets Finnish consumers, including specific segments such as students and shareholders, positioning itself as the leading loyalty program in Finland with extensive partner integration. Technically, the site is built using modern web technologies including React and styled-components, hosted behind Cloudflare, and integrates Google Tag Manager for analytics. However, the site lacks a valid SSL certificate, which severely impacts its security posture. While privacy and cookie policies are well documented and GDPR compliant, the absence of HTTPS and security headers exposes the site to risks. Overall, the site is functional and professionally designed but requires urgent security improvements to protect user data and maintain trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 100 · Medium
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. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

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

    • 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';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

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

Keep watching plussa.fi

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  • TLS certificates and expiry
  • DNS records
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  • 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
20
Email security
50
DNS health
85
Network security
100
GDPR outside view
58
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

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

K-Plussa operates in the retail sector as a loyalty program that incentivizes customer purchases through points and personalized offers. Its business model leverages partnerships with banks, service providers, and retail chains to create a broad ecosystem of benefits. The program's market position is strong in Finland, supported by Kesko's brand and extensive retail network. Revenue streams likely include increased customer retention and partner collaborations. The target audience includes general consumers, students, and shareholders, indicating segmentation strategies. The partnership ecosystem is diverse, including financial institutions like Nordea and DanskeBank, fuel providers like Neste, and retail chains such as K-Citymarket and K-Rauta. Strategic observations suggest continuous development of digital services and mobile app integration to enhance user engagement.

Security posture

The current security posture of the website is weak due to the absence of a valid SSL certificate, resulting in no HTTPS encryption. This exposes users to potential data interception and undermines trust. Additionally, the site lacks important security headers such as HSTS, Content-Security-Policy, and others that mitigate common web attacks. No incident response or security policy information is publicly available, and no vulnerability disclosure or security.txt file is found. While no known vulnerabilities or malware are detected, the lack of encryption and security best practices represents a critical risk. Privacy policies are comprehensive and GDPR compliant, indicating good data protection awareness, but technical security controls need urgent enhancement to align with best practices and regulatory expectations.

Recommendations

  1. Implement and maintain a valid SSL/TLS certificate to enable HTTPS across the entire site immediately.
  2. Enable HTTP Strict Transport Security (HSTS) with includeSubDomains and preload directives to enforce secure connections.
  3. Add essential security headers such as Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, and Referrer-Policy.
  4. Publish a security policy and incident response contact information to improve transparency and readiness.
  5. Consider implementing a security.txt file and a vulnerability disclosure program to encourage responsible reporting.
Technical notes

Notes

The website uses a modern React-based frontend with styled-components for styling, indicating a contemporary development approach. Hosting and DNS are managed via Cloudflare, providing CDN and DDoS protection benefits. Google Tag Manager is used for analytics and marketing tracking. However, the site currently lacks a valid SSL certificate, which is a significant technical deficiency. Performance metrics are not available, but the site includes responsive design elements and accessibility features such as skip-to-content links. SEO is supported by proper meta tags and Open Graph data. The absence of SSL and security headers represents a technical risk that could impact user trust and search engine rankings. Overall, the technical infrastructure is modern but requires security hardening and performance optimization.
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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