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Security report for csbnet.se

BrainMill AB · Telecommunications · Sweden

Medium risk. 10 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

53/100

Risk levelMedium

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

CSBNET is a specialized internet network portal operated by BrainMill AB, serving the tenants of Chalmers Studentbostäder in Sweden. The website provides resources including outage notifications, guides, FAQs, and a support ticket system. The business operates in the telecommunications sector with a niche focus on student housing internet services. The domain is well-established since 2003, indicating a stable presence in the market. Technically, the website employs modern frontend technologies such as React and Tailwind CSS, with authentication managed via Keycloak. The site is mobile-optimized and offers a good user experience with clear navigation and professional design. However, some technical improvements could enhance security and compliance, such as enabling DNSSEC and adding security headers. From a security perspective, the site uses HTTPS and has a reasonable security posture but lacks explicit privacy and cookie policies, which impacts GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected. The absence of contact emails and phone numbers limits direct communication channels. Overall, the website is trustworthy and professionally maintained but would benefit from enhanced privacy compliance and security best practices to improve user trust and regulatory adherence.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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

10 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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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';…

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Keep watching csbnet.se

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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
95
Security headers
15
Email security
40
DNS health
45
Network security
100
GDPR outside view
25
Average
53

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

BrainMill AB operates CSBNET as a service provider for internet connectivity and support within the student housing sector at Chalmers University. The company leverages partnerships with Chalmers Studentbostäder and related ISPs like Neanet. The business model focuses on providing reliable network services and support to a defined tenant base. The long domain age and consistent branding indicate a mature operation. Growth opportunities may include expanding support services and improving digital compliance. The partnership ecosystem is clear and focused on regional service delivery.

Security posture

The security maturity of CSBNET is moderate. HTTPS is enforced, and authentication is handled by Keycloak, which is a positive security control. However, the lack of DNSSEC and missing security headers such as Content-Security-Policy and X-Frame-Options represent areas for improvement. The absence of privacy and cookie policies suggests compliance gaps with GDPR. Incident response contact channels are not publicly disclosed, which could hinder timely reporting of security issues. Overall, the site is secure for general use but should enhance transparency and technical controls to meet higher compliance standards.

Recommendations

  1. Enable DNSSEC on the domain to protect against DNS spoofing and improve domain security.
  2. Publish comprehensive privacy and cookie policies to demonstrate GDPR compliance and inform users.
  3. Implement a cookie consent mechanism to comply with EU cookie regulations.
  4. Add standard security headers (CSP, X-Frame-Options, HSTS) to strengthen browser security.
  5. Provide clear incident response contact information such as security@ or abuse@ email addresses.

Contact details published on the site

Addresses
Legal name
BrainMill AB
Registration number
559107-8042
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
BrainMill AB
Description
A collection of resources for CSBNET - Chalmers Studentbostäder's Internet network - operated by BrainMill AB.
Key services
Internet network operation, Support portal, Outage and maintenance updates
Content quality
good
Branding
consistent

Technology

Stack
React (implied by data-react-helmet), Tailwind CSS, Keycloak (for authentication), JavaScript
Frameworks
React
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced (implied by og:url https)
  • Use of Keycloak for authentication

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

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 challenge.
  2. No explicit privacy, cookie, or terms of service policies found on main page.
  3. Contact information limited to physical address; no emails or phone numbers explicitly provided.
  4. Site uses modern frontend technologies and has good design and navigation.
  5. Security posture is decent but can be improved with additional headers and policies.
  6. WHOIS data supports a legitimate and established business presence.
Technical notes

Notes

The website is built using modern web technologies including React and Tailwind CSS, indicating a contemporary and maintainable codebase. Authentication is managed via Keycloak, a robust identity and access management solution. The site is mobile responsive and well-structured for SEO. Performance is moderate, with no major issues detected. However, the absence of CMS identification and hosting provider details limits deeper infrastructure insights. Technical debt appears low, but security enhancements and policy publications are recommended to reduce compliance risks.
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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