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Security report for nextcloud.com

Nextcloud · Technology · Germany

Medium risk. 1 critical or high finding in SSL/TLS.

Security score

75/100

Risk levelMedium

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

Nextcloud is a leading open source content collaboration platform offering a comprehensive suite of products including file storage, real-time document editing, video conferencing, groupware, and AI-powered assistant tools. The company targets enterprises, public sector organizations, service providers, education, and home users, positioning itself as a market leader in privacy-focused, self-hosted cloud collaboration solutions. The website reflects a mature, professional business with a strong global presence and a large user base. Technically, the website is built on WordPress with modern front-end technologies such as Bootstrap, jQuery, and Owl Carousel. It employs performance optimizations like WP Rocket and integrates Matomo for privacy-respecting analytics. The site is mobile-optimized, accessible, and SEO-friendly, demonstrating a high level of digital maturity. From a security perspective, the site enforces HTTPS, uses clientTransferProhibited domain status, and implements cookie consent mechanisms. However, DNSSEC is not enabled, and some security headers could be improved. No critical vulnerabilities or exposed sensitive data were detected. The absence of a security.txt or explicit vulnerability disclosure page is noted. Overall, the website presents a low-risk profile with strong business credibility, good privacy compliance, and a professional security posture. Strategic improvements in DNS security and security header implementation would further enhance trust and resilience.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 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

1 finding rated critical or high. Fix these first.

  1. 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 SSL Key Length

      SSL certificate uses 384-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

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Keep watching nextcloud.com

This scan found 14 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.

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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
65
Email security
85
DNS health
90
Network security
40
GDPR outside view
95
Average
75

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 nextcloud.com, from OffSeq Breach.

Total records
3,201
Employees
1
Customers
3,123
Third parties
77
Weak passwords
21%

Latest record dated 2026-06-08 · 36 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 nextcloud.com.

Select it in the checkout above.

Masked preview

  • –cloud.nextcloud.com2026-06-08

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

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

Nextcloud operates in the technology sector with a focus on open source cloud collaboration and file storage solutions. Its business model combines free open source software with enterprise-grade support and cloud services. The company serves a diverse customer base including governments, enterprises, service providers, educational institutions, and individual users. Its competitive advantages include strong privacy and security features, scalability from small to large deployments, and a vibrant community-driven development model. The partnership ecosystem is robust, supporting product enhancement and customer support. Growth indicators include frequent product updates, extensive case studies, and a global user base. The company is headquartered in Germany and has been established since 2005.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, domain transfer protection, and cookie consent mechanisms. Security headers are partially implemented but could be enhanced by adding X-Frame-Options, X-Content-Type-Options, and Referrer-Policy headers. DNSSEC is not enabled, representing a minor security gap. No exposed sensitive data or vulnerable libraries were detected. The site lacks a published security.txt or vulnerability disclosure policy, which could improve incident response readiness. Overall, the security posture is strong but has room for improvement in DNS security and formal vulnerability disclosure.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS integrity and security.
  2. Implement additional security headers such as X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.
  3. Publish a security.txt file and a clear vulnerability disclosure policy to facilitate responsible reporting.
  4. Review and refine inline scripts to fully comply with Content Security Policy (CSP) standards.
  5. Continue to maintain and enhance privacy compliance and user consent mechanisms.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nextcloud
Description
Nextcloud offers a modern, on premise content collaboration platform with real-time document editing, video chat & groupware on mobile, desktop and web. It is the most popular open source content collaboration platform for tens of millions of users at thousands of organizations across the globe.
Key services
Nextcloud Hub (Files, Talk, Groupware, Office, Assistant, Flow), Self-hosted file storage and sync, Private audio/video conferencing, Groupware (Calendar, Contacts, Mail), Online office suite, AI assistant, Business process automation
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Bootstrap, jQuery, Owl Carousel, FontAwesome, Matomo Analytics, WP Rocket
Frameworks
WPBakery Page Builder
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • No exposed sensitive data in HTML
  • Use of nonce and integrity attributes in scripts (partial)
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Marketing tools
Yoast SEO, WP Rocket, WPBakery Page Builder
Transparency
good

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 multimedia
  2. Strong focus on open source collaboration platform for enterprises and public sector
  3. Multiple language support and internationalization
  4. Comprehensive product and solution descriptions
  5. Clear calls to action for trials, downloads, and contact
  6. Use of modern web technologies and performance optimizations
  7. Good SEO and social media integration
  8. No signs of malicious or suspicious content
Technical notes

Notes

The website is built on a WordPress CMS platform enhanced with WPBakery Page Builder and optimized using WP Rocket for performance. It uses Bootstrap for responsive design and jQuery along with Owl Carousel and FontAwesome for interactive and visual elements. Analytics are handled by Matomo, a privacy-focused service. The site is well-structured with comprehensive metadata, Open Graph tags, and JSON-LD structured data for SEO and social media integration. Performance is fast with lazy loading and deferred scripts. Accessibility and mobile optimization are good, supporting a wide range of users. Hosting details are limited but domain registration is stable and consistent with business claims.
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

Earlier scans of this domain

  1. 75/100Medium22 findingsView report
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