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Security report for compositio.nl

Foundation Compositio Mathematica · Education · N/a

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

Security score

59/100

Risk levelMedium

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

Compositio Mathematica is a well-established academic journal specializing in pure mathematics, owned by the Foundation Compositio Mathematica. The website serves as a portal for publishing research papers, supporting open access journals, and sponsoring mathematical activities. The target audience primarily consists of academic researchers and mathematicians. The business model revolves around academic publishing with revenues reinvested into the mathematical community. Technically, the site uses modern web technologies including React and Ant Design, hosted by Hostnet B.V., with moderate performance and good mobile optimization. Security posture is solid with HTTPS and DNSSEC enabled, though improvements can be made by adding security headers and cookie consent mechanisms. Overall, the website is professional, trustworthy, and content-rich, with no signs of malicious activity or compliance violations.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 100 · High
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. 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 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

  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 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 compositio.nl

This scan found 29 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

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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
62
Security headers
30
Email security
70
DNS health
65
Network security
100
GDPR outside view
28
Average
59

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 Foundation Compositio Mathematica operates in the education sector, focusing on academic publishing. It holds a strong market position due to its long history and reputable editorial board. Revenue streams include journal subscriptions and open access support. The organization maintains partnerships with Cambridge University Press and other academic platforms. The website reflects a focused business model targeting scholarly authors and readers. Growth indicators include support for open access journals and sponsorship of prizes and conferences. The partnership ecosystem includes well-known academic publishers and mathematical societies.

Security posture

The website demonstrates a mature security posture with HTTPS and DNSSEC enabled, reducing risks of interception and DNS spoofing. No exposed sensitive data or vulnerable libraries were detected. However, the absence of security headers like Content-Security-Policy and Strict-Transport-Security is a gap that could be exploited. There is no published incident response or vulnerability disclosure information, which limits transparency. Privacy compliance is partial, with a privacy policy present but no cookie consent mechanism. Overall, the security maturity is good but can be enhanced by adopting additional best practices and transparency measures.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  2. Add a cookie policy and consent mechanism to improve GDPR compliance.
  3. Publish an incident response plan or security contact information to enhance transparency and readiness.
  4. Consider creating a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Regularly audit and update technical and security configurations to maintain high trust and compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Foundation Compositio Mathematica
Description
Compositio Mathematica publishes first-class research papers in pure mathematics since 1935. It is owned by the Foundation Compositio Mathematica, which supports open access journals and sponsors mathematics through publications, conferences, and prizes.
Key services
Publishing research papers, Supporting open access journals, Sponsoring mathematics conferences and prizes
Content quality
good
Branding
consistent

Technology

Stack
React, Ant Design, JavaScript
Frameworks
React
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • DNSSEC enabled
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is an academic journal platform with a focus on pure mathematics.
  2. Content is professionally presented and relevant to the target audience.
  3. No signs of malicious or suspicious activity.
  4. No cookie consent mechanism detected, which may be a compliance gap.
  5. No visible security headers in HTML; potential area for improvement.
  6. No contact phone numbers or physical addresses found.
  7. Email contact for submissions is provided.
  8. No social media links detected.
Technical notes

Notes

The website is built using React and Ant Design, indicating a modern and maintainable front-end architecture. Hosting is provided by Hostnet B.V., a reputable provider. Performance is moderate, with room for optimization. The site is mobile-friendly and accessible at a basic level. SEO is basic but includes essential meta tags. No CMS was detected, suggesting a custom or proprietary solution. There is no evidence of outdated or vulnerable libraries. Technical risks are low but could be further mitigated by improving security headers and privacy compliance features.
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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