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Security report for nuget.org

Microsoft · Technology · N/a

Low risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

82/100

Risk levelLow

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

NuGet.org is the official package repository and package manager platform for the .NET ecosystem, operated under the Microsoft umbrella. It serves as a central hub for developers to find, publish, and manage .NET packages, facilitating faster application development. The website is professionally designed, mobile-optimized, and provides extensive resources including documentation, package search, and community engagement through blogs and status updates. The platform targets .NET developers globally and holds a strong market position as the primary package manager for .NET technologies. Technically, the site leverages modern web technologies including HTML5, CSS3, Bootstrap, and JavaScript frameworks such as Knockout.js, integrated within the Microsoft technology stack. The infrastructure is likely hosted on Microsoft cloud services, ensuring fast performance and high availability. Accessibility and SEO optimizations are well implemented, contributing to a positive user experience. From a security perspective, NuGet.org enforces HTTPS and includes a cookie consent mechanism aligned with GDPR requirements. While explicit security headers are not visible in the HTML, it is presumed they are implemented server-side. The site does not expose sensitive data and uses secure forms. However, there is no dedicated security policy or vulnerability disclosure page, which could enhance transparency and incident response readiness. Overall, NuGet.org demonstrates a mature digital presence with strong business credibility and security posture. The lack of WHOIS data is typical for enterprise domains using privacy protection and does not detract from the site's legitimacy. Strategic recommendations include publishing explicit security policies, adding a security.txt file, and enhancing accessibility features to maintain compliance and trust.

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

2 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

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

Keep watching nuget.org

This scan found 15 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
82
Security headers
65
Email security
70
DNS health
90
Network security
100
GDPR outside view
83
Average
82

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

NuGet.org operates as a critical service within the Microsoft ecosystem, providing essential package management capabilities for .NET developers worldwide. Its business model revolves around offering a centralized repository that supports both package authors and consumers, fostering an open-source and collaborative environment. The platform benefits from Microsoft's brand strength and resources, positioning it as the dominant player in the .NET package management market. Revenue streams are indirect, primarily through Microsoft’s broader developer tools and cloud services ecosystem. The site’s partnership with Microsoft documentation and blog sites enhances its ecosystem integration. Growth indicators include a vast number of package downloads and versions, signaling strong community adoption. The absence of direct contact emails or phone numbers suggests a focus on self-service and automated support channels.

Security posture

NuGet.org exhibits a strong security posture with mandatory HTTPS, cookie consent aligned with privacy regulations, and secure form implementations. The site avoids exposing sensitive information and likely employs standard security headers, although these are not explicitly visible in the HTML content. The absence of a public security policy or incident response contact limits transparency and may hinder vulnerability reporting. No vulnerabilities or suspicious activities were detected in the content analysis. Compliance with GDPR is indicated through privacy and cookie policies. Incident response readiness could be improved by publishing dedicated security contacts and vulnerability disclosure mechanisms. Overall, the security maturity is high but could benefit from enhanced communication and formalized policies.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency and trust.
  2. Implement and publicly document a security.txt file to facilitate vulnerability disclosures.
  3. Enhance accessibility features to meet or exceed compliance standards.
  4. Regularly audit and disclose third-party scripts and dependencies to mitigate supply chain risks.
  5. Maintain and update privacy and cookie policies to reflect evolving regulations and best practices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Microsoft
Description
NuGet is the package manager for .NET. The NuGet Gallery is the central package repository used by all package authors and consumers.
Key services
Package hosting, Package search and discovery, Package upload and management, Documentation and learning resources
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, Bootstrap, JavaScript, Knockout.js, Microsoft Consent Framework
Platforms
.NET
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with management options
  • No exposed sensitive data in HTML
  • Secure forms with proper input types

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

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 no blocking or WAF challenges.
  2. Content is rich, professional, and targeted at .NET developers.
  3. Strong Microsoft branding and ecosystem integration.
  4. Comprehensive privacy and cookie policies with consent management.
  5. No direct contact emails or phone numbers publicly listed; contact via policy page.
  6. No explicit security policy or incident response page found.
  7. No visible analytics or advertising scripts detected.
  8. WHOIS data is unavailable or protected, common for enterprise domains.
Technical notes

Notes

The website is built on a modern technology stack consistent with Microsoft’s web development standards, including Bootstrap for responsive design and Knockout.js for dynamic UI elements. The site is hosted on Microsoft infrastructure, ensuring robust performance and uptime. SEO and accessibility considerations are well addressed, with proper meta tags, ARIA labels, and mobile optimization. The use of a cookie consent framework indicates attention to privacy compliance. No CMS is explicitly detected, suggesting a custom or proprietary platform. Performance is fast with no visible errors or broken elements. Opportunities exist to enhance security header transparency and formalize security documentation.
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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