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Security report for mattecentrum.se

Mattecentrum · Education · Sweden

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

68/100

Risk levelMedium

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

Mattecentrum is a well-established Swedish non-profit organization providing free mathematics homework help to children and youth across Sweden. The website serves as a comprehensive platform offering various services including physical meeting places (Räknestugor), digital tools, video homework help, and educational events. The organization maintains a strong market position as a leading provider of free math tutoring, supported by volunteer coaches and partnerships with other educational platforms. The site is professionally designed with consistent branding and clear navigation, targeting Swedish students and their families. Technically, the website employs modern web technologies such as Google Tag Manager, jQuery, Vue.js components, and a custom chat widget powered by n8n. It is built on the Umbraco CMS platform and integrates cookie consent management via CookieTractor, ensuring compliance with GDPR. The site is mobile-optimized and accessible, with good SEO practices and performance. Analytics tools like Google Analytics and Hotjar are used for visitor insights, with appropriate cookie consent mechanisms in place. From a security perspective, the site enforces HTTPS and uses security cookies to protect against CSRF attacks. While explicit security headers are not fully documented in the HTML, the overall posture is good with no visible vulnerabilities or exposed sensitive data. However, the absence of a published security policy or incident response contact is noted as an area for improvement. The WHOIS data for the www subdomain is missing, likely due to it being a subdomain of mattecentrum.se, but the website content and certifications strongly indicate legitimacy. Overall, Mattecentrum's website is a trustworthy, well-maintained digital presence for a reputable non-profit educational organization. Strategic recommendations include enhancing security header implementation, publishing a security policy, and adding vulnerability disclosure information to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

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. 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

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

Keep watching mattecentrum.se

This scan found 25 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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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
72
Security headers
35
Email security
50
DNS health
65
Network security
100
GDPR outside view
83
Average
68

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

Mattecentrum operates in the education and non-profit sectors, focusing on free math tutoring for Swedish youth. Its business model relies on volunteer engagement, donations, and partnerships with educational platforms. The organization leverages digital tools and physical meeting places to maximize outreach. The website reflects a mature digital strategy with integrated analytics and user engagement features. Partnerships with sites like matteboken.se and pluggakuten.se enhance its service offering. The presence of certifications such as 90-konto and membership in Giva Sverige reinforce its credibility. The organization targets students, parents, and volunteers, positioning itself as a key player in Sweden's educational support ecosystem.

Security posture

The website demonstrates a solid security posture with HTTPS enforced and use of security cookies for CSRF protection. Cookie consent is actively managed, indicating GDPR awareness. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the lack of explicit security headers like X-Frame-Options and X-Content-Type-Options is a minor gap. There is no visible security policy or incident response contact information, which could hinder vulnerability reporting and incident management. Overall, the security maturity is good for a non-profit educational site but could be improved by formalizing security documentation and enhancing header configurations.

Recommendations

  1. Implement and explicitly configure security headers such as X-Frame-Options and X-Content-Type-Options to enhance protection against clickjacking and MIME sniffing.
  2. Publish a clear security policy page outlining security practices and compliance measures to increase transparency and trust.
  3. Add a security.txt file or dedicated vulnerability disclosure page with contact information to facilitate responsible reporting of security issues.
  4. Regularly audit third-party scripts and libraries to ensure no vulnerable versions are in use and maintain up-to-date dependencies.
  5. Enhance incident response readiness by defining and communicating clear channels for security incident reporting and response.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mattecentrum
Description
Mattecentrum är en religiöst och politiskt obunden ideell förening som erbjuder gratis läxhjälp i matematik till Sveriges barn och unga.
Key services
Gratis läxhjälp i matematik, Räknestugor (meeting places for math help), Digitala verktyg, Videoläxhjälp, Matteninja, Mattekonvent, Podcast
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, jQuery, Vue.js (vue-simple-suggest), CookieTractor (cookie consent management), n8n Chat Widget, Geist Sans font, Lime Forms
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • XSRF-TOKEN cookie for CSRF protection on forms
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Hotjar
Marketing tools
CookieTractor
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. Strong focus on free math help for children and youth in Sweden.
  3. Multiple social media channels actively linked.
  4. Cookie consent and privacy compliance mechanisms implemented.
  5. WHOIS data for www.mattecentrum.se subdomain not found, likely a subdomain of mattecentrum.se.
  6. No explicit security.txt or incident response info found.
  7. Good use of modern web technologies and responsive design.
  8. No adult or questionable content detected.
Technical notes

Notes

The website is built on the Umbraco CMS platform, utilizing modern JavaScript libraries including jQuery and Vue.js components for enhanced interactivity. Google Tag Manager is used for analytics and marketing tag management. The site loads fonts from Google Fonts and uses CookieTractor for cookie consent management. A custom chat widget powered by n8n provides user engagement capabilities. The site is mobile-responsive with good accessibility features and SEO optimization. Performance is moderate, with asynchronous loading of scripts and optimized assets. Technical debt appears low, but opportunities exist to improve security header implementation and formalize security documentation.
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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