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Security report for lightspeed.ac

wsrv.nl contributors · Technology · N/a

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

75/100

Risk levelMedium

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

The website wsrv.nl operates as an open source image caching and resizing service, leveraging a worldwide CDN infrastructure provided by Cloudflare. It targets developers and businesses requiring fast and efficient image manipulation services. The project is well-established with a history dating back to 2007, though the current domain was registered recently in 2024. The service is widely used, processing millions of images per hour and generating significant outbound traffic, indicating a strong market presence in the technology sector focused on image processing. Technically, the site employs modern technologies such as nginx, libvips, and VitePress for documentation, with Cloudflare providing CDN and hosting services. The website is performant, mobile-optimized, and accessible, with a clean and professional design. The use of Algolia search enhances user experience. However, the site lacks some security best practices such as DNSSEC and security headers, and does not provide cookie or terms of service policies. From a security perspective, the site benefits from HTTPS enforced by Cloudflare and domain registration protections like clientDeleteProhibited status. Nonetheless, the absence of DNSSEC and security headers, as well as missing incident response and security policy information, represent areas for improvement. No vulnerabilities or malicious content were detected, and the site is free from adult or questionable content. Overall, wsrv.nl is a credible and technically sound open source project with moderate security posture and privacy compliance. Strategic improvements in security headers, DNSSEC, and privacy policies would enhance trust and compliance. The lack of direct contact information and formal security policies limits business credibility slightly but does not detract significantly from the service's utility and reputation.

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

5 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 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

  3. 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 256-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

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

Keep watching lightspeed.ac

This scan found 19 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
75
Security headers
55
Email security
80
DNS health
85
Network security
100
GDPR outside view
53
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

Technical appendix

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

Business context

Business profile

wsrv.nl positions itself as a niche open source technology provider specializing in image caching and resizing services. Its competitive advantage lies in its high performance, global CDN integration, and open source nature, allowing users to deploy and customize the service freely. Revenue streams are not explicit, suggesting a community-supported or donation-based model rather than commercial sales. The target customers are developers and businesses needing scalable image processing solutions. The project has a strong partnership ecosystem with GitHub for code hosting and Cloudflare for CDN services. Growth indicators include high traffic volumes and active contributor engagement. Strategic observations highlight the importance of enhancing security and privacy compliance to support broader enterprise adoption.

Security posture

The current security maturity of wsrv.nl is moderate. The site benefits from HTTPS and domain registration protections but lacks advanced DNS security (DNSSEC) and critical HTTP security headers. There is no published security policy or incident response contact, which limits transparency and readiness for security incidents. Compliance with GDPR and other privacy regulations is minimal, with only a basic privacy policy linked externally and no cookie consent mechanism. No exposed sensitive data or vulnerable libraries were detected. The security culture appears informal, consistent with an open source project, but could be improved by formalizing policies and enhancing technical controls.

Recommendations

  1. Enable DNSSEC on the domain to protect against DNS spoofing and improve overall DNS security.
  2. Implement essential HTTP security headers such as Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security to harden the website against common attacks.
  3. Publish a comprehensive security policy and provide clear incident response contact information to improve transparency and trust.
  4. Add a cookie policy and consent mechanism if any cookies or tracking technologies are used to comply with privacy regulations.
  5. Consider adding contact information or support channels to enhance business credibility and user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
wsrv.nl contributors
Description
An image cache & resize service that manipulates images on-the-fly with a worldwide cache.
Key services
Image caching, Image resizing, Fast image processing, CDN caching
Content quality
good
Branding
consistent

Technology

Stack
nginx, libvips, Cloudflare CDN, VitePress, JavaScript ES Modules
Frameworks
VitePress
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced (implied by Cloudflare usage)
  • Domain status includes clientDeleteProhibited and clientTransferProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Marketing tools
Algolia search
Transparency
poor

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate

Key observations

  1. Website is an open source image caching and resizing service.
  2. Content is fully accessible with no WAF blocking.
  3. No contact emails or phone numbers found on site.
  4. No cookie or terms of service policies detected.
  5. Privacy policy is linked externally on GitHub.
  6. No security policy or incident response information provided.
  7. Technical stack is modern and performance optimized.
  8. No advertising or tracking detected except Algolia search.
  9. No adult or questionable content detected.
Technical notes

Notes

The website is built using modern web technologies including VitePress for static site generation and documentation, nginx and libvips for backend image processing, and Cloudflare for CDN and hosting. The site is performant with fast loading times and good mobile optimization. The use of Algolia search improves user navigation and content discoverability. There is no CMS detected, indicating a static or custom-built site. The domain is newly registered but supports an established open source project. Technical risks include lack of DNSSEC and missing security headers, which could expose the site to DNS attacks and common web vulnerabilities. Overall, the technical infrastructure is solid but could benefit from enhanced security configurations.
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. 68/100Medium34 findingsView report
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