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Security report for gradivo.hr

Education · Croatia

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

50/100

Risk levelMedium

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

Gradivo.hr is an online education platform primarily targeting high school students in Croatia, offering video lessons, practice exercises, and preparation materials for the state maturity exams. It positions itself as the largest online provider of such educational content in the region, operating on a subscription-based business model. The website is professionally designed with a clear focus on user experience and accessibility, leveraging modern web technologies such as React and Next.js. Integration with marketing tools like Google Tag Manager and Shopify Chat enhances user engagement and analytics capabilities. Security posture is solid with HTTPS enforced and use of script offloading via Partytown, though there is room for improvement in security headers and explicit privacy compliance disclosures. The domain WHOIS data is privacy protected, which is common for this business type, and no suspicious patterns were detected. Overall, the platform appears legitimate, professional, and focused on delivering educational value to its audience.

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

9 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';…

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

Keep watching gradivo.hr

This scan found 23 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

Email alerts on material changes and an exportable JSON history of every change.

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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
75
Security headers
20
Email security
75
DNS health
80
Network security
40
GDPR outside view
10
Average
50

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 platform targets the education sector, specifically high school students preparing for maturity exams in Croatia. Its competitive advantage lies in offering extensive video content and interactive materials accessible 24/7, with a subscription model that undercuts traditional in-person instruction costs. The business leverages digital marketing and chat support to enhance customer acquisition and retention. While no explicit company registration or VAT information is found, the professional presentation and market positioning suggest a medium-sized enterprise with a focused niche. The absence of direct contact details may limit trust for some users but aligns with privacy considerations. The platform's ecosystem includes integrations with Shopify for chat and Google Tag Manager for analytics, indicating a mature digital marketing approach.

Security posture

The website enforces HTTPS and uses modern security practices such as script offloading with Partytown to reduce third-party script impact. However, the absence of visible security headers like Content-Security-Policy and lack of explicit privacy and cookie policies reduce the overall security maturity. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The platform does not provide explicit incident response contacts or security policies, which could be improved to enhance trust and compliance. GDPR compliance is implied but not explicitly documented on the site. Overall, the security posture is good but could benefit from enhanced transparency and technical controls.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie policy with clear GDPR compliance statements.
  2. Add security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to improve security posture.
  3. Provide clear contact information for business and security incident reporting, including a security.txt file for vulnerability disclosures.
  4. Enhance accessibility features to meet higher standards and improve user experience for all users.
  5. Regularly audit third-party scripts and tracking tools to minimize privacy risks and improve performance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
Online instrukcije i pripreme za maturu dostupne svaki dan, cijeli dan. Prva pretplata na instrukcije u regiji. Najveći online pružatelj priprema za državnu maturu.
Key services
Online instructions, Video lessons, Exam preparation, Practice exercises
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, Shopify Chat Widget, Google Tag Manager, Partytown
Frameworks
Next.js
Platforms
Shopify (chat integration)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Use of Partytown to offload third-party scripts

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Facebook Pixel, TikTok Pixel
Marketing tools
Shopify Chat Widget
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional online education platform focused on high school exam preparation.
  2. Content is rich with video lessons and practice materials.
  3. No direct contact emails or phone numbers found in the HTML content.
  4. No explicit privacy or cookie policy pages detected in the provided content.
  5. Use of modern web technologies and integration with marketing and chat tools.
  6. WHOIS data is privacy protected and unavailable due to GDPR.
  7. No signs of WAF or content blocking detected.
Technical notes

Notes

The website is built using Next.js and React, indicating a modern and scalable frontend architecture. It integrates third-party services such as Shopify Chat and Google Tag Manager for marketing and user engagement. The use of Partytown to offload third-party scripts is a positive performance and security optimization. The site appears mobile-optimized with responsive design and preloading of fonts and scripts. However, no CMS is explicitly detected, suggesting a custom or headless approach. Performance is moderate with room for improvement in SEO and accessibility. Hosting provider details are not evident from the content. Overall, the technical infrastructure supports a professional and user-friendly educational platform.
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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