Mattecentrum · Education · Sweden
Medium risk. 3 critical or high findings in Security headers, SSL/TLS and 1 other check.
Matteboken.se is a well-established, free digital mathematics learning platform operated by Mattecentrum, a Swedish non-profit organization dedicated to supporting students in mathematics from grade 3 through high school. The website offers comprehensive educational content including theory, video lessons, exercises, and access to past national exams, supplemented by digital tools such as Python programming and GeoGebra guides. It serves a broad audience of students and educators, positioning itself as a trusted resource in the Swedish educational landscape. Technically, the site employs a modern technology stack featuring AngularJS, MathJax for mathematical rendering, and various JavaScript libraries to deliver a responsive and accessible user experience. The use of Google Tag Manager, Hotjar, and CookieTractor indicates a mature approach to analytics and privacy compliance, including a robust cookie consent mechanism. The site is hosted securely over HTTPS, with security cookies and spam protection measures like Google reCAPTCHA implemented. From a security perspective, the website demonstrates good practices such as secure cookie usage and consent management, though it lacks explicit security headers and published security policies. The absence of WHOIS data for the domain is a notable anomaly, though the website's content and external references support its legitimacy. No critical vulnerabilities or adult content were detected, and the site maintains a high standard of content quality and professionalism. Overall, Matteboken.se represents a high-quality, trustworthy educational platform with strong technical and security foundations. Strategic improvements could include publishing clear privacy and security policies, providing direct contact information, and enhancing security headers to further strengthen its posture.
Scanned
NIS2 Art. 21(2)
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.
3 findings rated critical or high. Fix these first.
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.
Controls resources the browser is allowed to load
What to do: Implement a Content-Security-Policy appropriate for your application
TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.
Server supports weak protocols: TLSv1.1
What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions
DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.
SPF record has permissive policy allowing any server to send email
What to do: Use -all or ~all qualifier for better email security
Need hands-on remediation? Email guard@offseq.com
This scan found 21 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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Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention matteboken.se, from OffSeq Breach.
1 subdomain affected
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Breach keeps ingesting new leaks, so these numbers can grow between scans.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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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