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Security report for nucleoapp.com

Nucleo · Technology · Italy

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

65/100

Risk levelMedium

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

Nucleo is a specialized technology company offering a comprehensive icon bundle and a dedicated icon organizer application for Mac and Windows platforms. Established in 2014 and operated by a small, independent team based in Italy, Nucleo serves a niche market of designers and developers with a high-quality product portfolio. The website reflects a mature digital presence with professional design, clear navigation, and a focus on user experience. Technically, the site employs modern web standards, uses Cloudflare DNS, and integrates privacy-conscious analytics via Umami. Security posture is solid with HTTPS enabled and no exposed sensitive data, though improvements such as enabling DNSSEC and adding security headers could enhance protection. Privacy compliance is well addressed with a cookie consent banner and a clear privacy policy. Overall, the business demonstrates credibility and trustworthiness with a long domain history and transparent team information.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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

6 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 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';…
  2. GDPR outside view

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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

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

Keep watching nucleoapp.com

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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
75
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
53
Average
65

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention nucleoapp.com, from OffSeq Breach.

Total records
121
Employees
0
Customers
121
Third parties
0
Weak passwords
9%

2 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for nucleoapp.com.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Nucleo occupies a strong position in the icon and UI asset market, targeting professional designers and developers who require extensive icon libraries and management tools. The business model centers on software sales and licensing, supported by a loyal user base exceeding 20,000 customers. The company is bootstrapped and independent, emphasizing quality and continuous updates. Partnerships appear limited but include a design agency (Amber Creative) credited in the footer. The website content and social media presence reinforce brand consistency and market focus. Revenue streams likely derive from icon bundle sales, app downloads, and possibly team licensing. Growth indicators include regular updates and a well-maintained digital platform.

Security posture

The website demonstrates a good security baseline with HTTPS enforced and no visible sensitive data leaks. However, the absence of DNSSEC and security headers such as Content Security Policy, HSTS, and X-Frame-Options represents an area for improvement. No explicit security policies or incident response contacts are published, which could hinder transparency and trust in case of security incidents. The use of Umami Analytics suggests a privacy-aware approach to user tracking. Overall, the security maturity is moderate to good but could benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and prevent spoofing.
  2. Implement standard security headers (CSP, HSTS, X-Frame-Options) to harden the website against common attacks.
  3. Publish a dedicated security policy page including incident response contacts to improve transparency and trust.
  4. Add a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  5. Continue maintaining privacy compliance and consider expanding user data protection disclosures.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nucleo
Description
Nucleo offers a premium-quality icon bundle with 33,954 SVG icons for user interfaces, presentations, and print projects. It provides an app for Mac and Windows to organize, customize, and share icons. The business is independent and bootstrapped, run by two developers in Italy since 2014.
Key services
Icon bundles (SVG icons), Icon organizer application for Mac and Windows, Icon customization and sharing
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Google Fonts (Inter), Cloudflare DNS, Umami Analytics
Platforms
Mac, Windows
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML
  • Cookie consent banner implemented

Analytics and tracking

Services
Umami Analytics
Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
Umami Analytics
Transparency
basic

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 content and professional design.
  2. Clear business focus on icon bundles and icon management software.
  3. No direct contact emails or phone numbers found on homepage; contact likely via contact form.
  4. Cookie consent banner present and functional.
  5. No explicit security policy or incident response contacts published.
  6. No security headers detected in provided data; SSL is enabled and good.
  7. Use of Umami Analytics indicates privacy-conscious tracking.
  8. Social media presence on X (Twitter) confirmed.
  9. No suspicious or malicious content detected.
Technical notes

Notes

The website is built with modern HTML5, CSS3, and JavaScript, leveraging Google Fonts and Cloudflare DNS services. It is optimized for mobile devices with responsive design and good accessibility features. Performance is fast with optimized images and minimal external dependencies. The use of Umami Analytics reflects a modern, privacy-focused analytics approach. No CMS or heavy frameworks detected, indicating a lightweight and maintainable infrastructure. Hosting appears stable and secure, though the lack of DNSSEC and security headers suggests some technical debt in security hardening. Overall, the technical implementation supports a professional and user-friendly experience with room for security enhancements.
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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