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Security report for 21k.ee

Tallinna 21. Kool · Education · Estonia

High risk. 10 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

39/100

Risk levelHigh

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

Tallinna 21. Kool is a well-established educational institution in Estonia, providing primary and secondary education with a focus on modern, innovative learning approaches. The school has a strong market position supported by a long history since 1903 and multiple recognitions and awards. The website reflects a medium-sized institution targeting students, parents, and educators with comprehensive educational services and extracurricular activities. Technically, the site is built on WordPress with a modern tech stack including Bootstrap and various JavaScript libraries, delivering a good user experience with mobile optimization and clear navigation. Security posture is solid with HTTPS and anonymized Google Analytics tracking, though it lacks some advanced security headers and formal security policies. Privacy compliance is limited due to missing privacy and cookie policies. Overall, the site is professional and trustworthy but could improve in privacy and security transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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

10 findings rated critical or high. Fix these first.

  1. GDPR outside view

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

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  2. 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';…

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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
62
Security headers
15
Email security
60
DNS health
65
Network security
20
GDPR outside view
10
Average
39

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

The school operates as a public educational entity in Estonia, leveraging partnerships with international educational networks such as Cambridge English and Erasmus Plus. Its business model is focused on delivering quality education and fostering student development in arts, sports, and entrepreneurship. The website content and structure indicate active engagement with the community and stakeholders, supported by a variety of communication channels and social media presence. The institution benefits from a stable domain registration and hosting provider consistent with its geographic location. Growth indicators include ongoing events, projects, and awards, positioning the school as a reputable and innovative educational provider in the region.

Security posture

The website demonstrates a mature security posture with enforced HTTPS and privacy-conscious Google Analytics configuration. However, the absence of key security headers such as Content-Security-Policy and Strict-Transport-Security reduces its defense-in-depth. No vulnerability disclosure or incident response information is provided, which limits transparency and readiness for security incidents. The site does not expose sensitive data or use vulnerable libraries visibly, indicating good maintenance practices. To enhance security maturity, the school should implement security headers, publish a security policy, and establish clear incident response contacts. Privacy compliance gaps, especially regarding cookie consent, should be addressed to meet GDPR requirements fully.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy with GDPR compliance details.
  2. Implement a cookie consent mechanism to obtain user consent for tracking.
  3. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Create and publish a security policy and incident response contact information, including a security.txt file.
  5. Regularly audit and update third-party plugins and scripts to mitigate vulnerabilities.

Contact details published on the site

Addresses
Legal name
Tallinna 21. Kool
Registration number
75017644
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tallinna 21. Kool
Description
Tallinna 21. Kool is an educational institution providing primary and secondary education with a focus on modern 21st century learning. The school offers various programs including basic education, gymnasium studies, and extracurricular activities. It emphasizes tradition combined with innovation and supports student development in arts, music, sports, and entrepreneurship.
Key services
Primary and secondary education, Extracurricular activities, Student support services, Cultural and sports events, International projects and language teaching
Content quality
good
Branding
consistent

Technology

Stack
WordPress 6.8.1, Google Analytics (MonsterInsights plugin), jQuery, Bootstrap 3.3.6, Nivo Slider, Owl Carousel, Magnific Popup
Frameworks
Bootstrap
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced with SSL
  • Google Analytics configured with IP anonymization
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Marketing tools
MonsterInsights Google Analytics plugin
Transparency
basic

Site quality

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

Key observations

  1. Website is a well-established educational institution site with rich content and multiple sections
  2. No privacy or cookie policy pages detected, which is a compliance gap
  3. Contact information is clearly provided in footer and contact pages
  4. Multiple social media channels are linked and active
  5. Uses WordPress CMS with common plugins and libraries
  6. SSL is properly configured and HTTPS enforced
  7. No visible security headers detected; opportunity for improvement
  8. No security.txt or vulnerability disclosure policy found
  9. No incident response or security contact information found
  10. Content is in Estonian with some multilingual support links
Technical notes

Notes

The website is built on WordPress 6.8.1 with a Bootstrap 3.3.6 framework and uses common JavaScript libraries like jQuery, Owl Carousel, and Nivo Slider for UI components. Google Analytics is integrated via MonsterInsights with IP anonymization enabled. The site is hosted by Zone Media OÜ, an Estonian hosting provider, consistent with the domain registration data. Performance is moderate with good mobile optimization and basic accessibility features. SEO is supported by proper meta tags and structured navigation. The site uses multiple external resources including Google Fonts and Maps APIs. There is room for technical improvement in security headers and privacy compliance mechanisms.
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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