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Security report for quickshare.cz

Ulož.to Disk · Technology · Czech Republic

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

73/100

Risk levelMedium

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

Ulož.to Disk is a Czech Republic-based personal cloud backup service offering a range of storage plans from a free 25 GB tier up to 100 TB for paid subscribers. The service emphasizes secure file storage with end-to-end encryption and provides modern applications across multiple platforms including Windows, Android, and iOS. The website is professionally designed with clear navigation and multilingual support, targeting general users seeking reliable cloud storage and file sharing solutions. Technically, the site employs modern JavaScript frameworks, Google Tag Manager, and analytics tools, hosted likely behind Cloudflare infrastructure ensuring fast performance and security. Security posture is solid with HTTPS enforced and privacy policies in place, though explicit security policies and incident response details are not published. No vulnerabilities or suspicious elements were detected. Overall, the site is trustworthy, compliant with GDPR, and well-positioned in the cloud storage market.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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

5 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 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. GDPR outside view

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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. 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
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching quickshare.cz

This scan found 18 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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Full report

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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
57
Security headers
35
Email security
95
DNS health
85
Network security
100
GDPR outside view
68
Average
73

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 company operates a subscription-based cloud storage business model with free and premium tiers, targeting individual users and businesses needing large-scale personal backup solutions. Its competitive advantage lies in offering very large storage capacities and secure sharing with end-to-end encryption. The presence of multiple platform apps and API access indicates a mature product ecosystem. The website's multilingual support and clear pricing plans suggest a focus on international markets, primarily in Europe. The lack of direct contact emails or phone numbers may indicate a primarily digital-first customer support approach. No direct partnerships or subsidiaries were identified from the data. The company appears to maintain a professional online presence with consistent branding and legal compliance.

Security posture

The website demonstrates a good security posture with HTTPS enforced and cookie consent mechanisms implemented. The use of end-to-end encryption for user data is a strong security feature, though details are not deeply disclosed. Security headers are implied but not explicitly confirmed in the HTML content. No security.txt or vulnerability disclosure policy is published, which is a gap in transparency. Incident response contact channels are not provided, limiting direct communication for security issues. No exposed sensitive data or vulnerable libraries were detected. Overall, the security maturity is good but could be improved by publishing explicit security policies and providing direct security contacts.

Recommendations

  1. Publish a dedicated security policy page detailing security controls and data protection measures.
  2. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  3. Provide explicit incident response contact channels such as security@ or abuse@ email addresses.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Regularly audit and confirm presence of security headers and update them as needed.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Ulož.to Disk
Description
Ulož.to Disk is a personal backup service offering cloud storage solutions with plans up to 100 TB, including a free 25 GB plan. It provides secure file storage, sharing with end-to-end encryption, and modern applications for multiple platforms.
Key services
Cloud file storage, File sharing with end-to-end encryption, Cross-platform applications (Windows, Android, iOS), API access
Content quality
good
Branding
consistent

Technology

Stack
RequireJS, Google Tag Manager, Google Analytics, Modernizr, JavaScript ES6+, SVG graphics
Platforms
Web, Windows, Android, iOS
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • End-to-end encryption for user data (claimed)

Analytics and tracking

Services
Google Analytics, Cloudflare Insights
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Cloudflare Insights
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges
  2. Comprehensive legal pages present including privacy, terms, and cookie policy
  3. No direct company emails or phone numbers found, only contact form
  4. Modern web technologies and tracking tools used
  5. Strong emphasis on security and privacy in marketing content
  6. No explicit security policy or incident response details published
  7. No vulnerability disclosure or security.txt found
  8. Multiple language versions available
  9. Clear business focus on personal cloud backup and file sharing
Technical notes

Notes

The website uses RequireJS for modular JavaScript loading, Google Tag Manager and Google Analytics for marketing and analytics, and Modernizr for feature detection. SVG graphics are used for logos and illustrations, enhancing visual quality. Hosting appears to be behind Cloudflare, providing CDN and security benefits. The site is mobile optimized with responsive design and good SEO practices including meta tags and Open Graph data. No CMS was detected, suggesting a custom or proprietary platform. Performance is fast with asynchronous script loading and preloading of fonts. Technical risks are minimal but could include reliance on third-party analytics and tracking services which may impact privacy perceptions.
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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