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Security report for mathplanet.com

Mattecentrum · Education · Sweden

Medium risk. 3 critical or high findings in Security headers, SSL/TLS and 1 other check.

Security score

74/100

Risk levelMedium

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

Mathplanet is a free educational platform focused on providing US high school mathematics courses, operated by the Swedish non-profit organization Mattecentrum. The website offers courses in Pre-algebra, Algebra 1, Algebra 2, Geometry, and practice tests for SAT and ACT. It is supported by a network of volunteers and donations, emphasizing equal access to math education. The platform is well-branded, professionally designed, and offers a comprehensive learning experience with additional resources linked from partner sites. Technically, the site uses AngularJS, MathJax, and other modern libraries, hosted likely on a CMS platform (Umbraco). Security posture is good with HTTPS and cookie consent mechanisms, but lacks explicit privacy and terms of service pages and security headers. WHOIS data is missing or unavailable, which raises some concerns about domain registration transparency. Overall, the site is trustworthy and safe for general audiences, with a strong educational mission.

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

3 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 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

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Weak SPF Policy

      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

Keep watching mathplanet.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.

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

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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
60
Email security
85
DNS health
45
Network security
100
GDPR outside view
83
Average
74

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

Mathplanet operates in the education sector as a small non-profit entity affiliated with Mattecentrum. Its market position is that of a free, accessible math learning resource targeting high school students, primarily in the US but open globally. The business model relies on donations and volunteer support. The platform integrates with a partner ecosystem of Swedish educational resources and uses PayPal for donations. The site demonstrates strong content quality and user engagement potential, with clear navigation and a professional digital presence. Growth opportunities include expanding content, improving compliance documentation, and enhancing security transparency.

Security posture

The website enforces HTTPS and uses Google reCAPTCHA for form spam protection. It implements a cookie consent mechanism compliant with GDPR principles. However, it lacks visible security headers such as Content-Security-Policy and X-Frame-Options, which could improve protection against common web attacks. No vulnerabilities or exposed sensitive data were detected in the analysis. The absence of a published privacy policy and terms of service is a compliance gap. Incident response and vulnerability disclosure mechanisms are not present, limiting transparency. Overall, the security posture is moderate to good but could be improved with additional documentation and headers.

Recommendations

  1. Publish a comprehensive privacy policy page detailing data collection, usage, and user rights.
  2. Add terms of service and security policy documents to improve legal transparency.
  3. Implement standard security headers (CSP, X-Frame-Options, X-Content-Type-Options) to enhance protection.
  4. Establish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Provide incident response contact information to improve trust and readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mattecentrum
Description
Mathplanet is a free, accessible platform for learning mathematics offering high school math courses in Pre-algebra, Algebra 1, Algebra 2, and Geometry. It is a free service provided by Mattecentrum, a Swedish non-profit organization focused on providing free math support and education.
Key services
Free math courses (Pre-algebra, Algebra 1, Algebra 2, Geometry), Practice tests for SAT and ACT, Math labs and tutoring support via Mattecentrum, Digital math labs and homework assistance, Additional educational resources (Matteboken, Formelsamlingen, Pluggakuten)
Content quality
excellent
Branding
consistent

Technology

Stack
AngularJS 1.8.2, Angular UI Router 1.0.29, PrismJS 1.27.0, JSXGraph 0.96, MathJax 2.7.1, jQuery 1.10.2, Google Tag Manager, CookieTractor
Frameworks
AngularJS
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • Use of Google reCAPTCHA for spam protection

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

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 educational content
  2. No WHOIS registration data found, domain status unclear
  3. Strong affiliation with Swedish non-profit Mattecentrum
  4. Cookie consent and GDPR compliance mechanisms implemented
  5. No explicit privacy policy or terms of service pages found
  6. Use of modern web technologies and frameworks
  7. No security headers detected in provided data
  8. No contact phone numbers or physical addresses found, only email contact
  9. No evidence of adult or questionable content
Technical notes

Notes

The website uses AngularJS 1.8.2 with Angular UI Router, PrismJS for code highlighting, JSXGraph for math visualization, and MathJax for rendering math formulas. It integrates Google Tag Manager and Google Analytics for tracking, with cookie consent managed by CookieTractor. The CMS appears to be Umbraco, inferred from API endpoints. Performance is moderate with good mobile optimization and accessibility. The site uses modern fonts and responsive design. Technical debt may exist due to AngularJS (an older framework), suggesting future modernization opportunities. No critical technical risks were identified.
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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