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Security report for joinapart.co

SeenThis AB · Technology · Sweden

Medium risk. 7 critical or high findings in Email security, Security headers and 2 other checks.

Security score

64/100

Risk levelMedium

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

Sitestream, operated by SeenThis AB, is a technology company specializing in optimizing website image delivery to reduce data transfer and improve user experience while contributing to sustainability by lowering internet carbon emissions. The company targets website owners and developers seeking efficient image streaming solutions, offering a SaaS model with easy integration options including a WordPress plugin and script implementation. The website is professionally designed with consistent branding and clear navigation, reflecting a small but focused technology provider based in Sweden. Technically, the website leverages modern frameworks such as Svelte and employs a fast, mobile-optimized infrastructure with CDN usage for content delivery. While the site uses HTTPS and some security headers, there is room for improvement in security policies and headers such as Content-Security-Policy. No analytics or advertising scripts were detected, indicating a privacy-conscious approach. The site provides basic privacy and cookie policies but lacks a cookie consent mechanism. From a security perspective, the site demonstrates good practices with HTTPS and no visible vulnerabilities or exposed sensitive data. However, the absence of explicit incident response information and vulnerability disclosure policies suggests areas for enhancement. The WHOIS data aligns well with the website's claims, supporting legitimacy and trustworthiness. Overall, Sitestream presents a credible and professional online presence with a strong focus on sustainability and web performance. Strategic improvements in security policy transparency, cookie consent, and accessibility would further strengthen its security posture and compliance standing.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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

7 findings rated critical or high. Fix these first.

  1. 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

  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 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';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

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

Keep watching joinapart.co

This scan found 24 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
77
Security headers
25
Email security
40
DNS health
75
Network security
100
GDPR outside view
68
Average
64

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 joinapart.co, from OffSeq Breach.

No leaked records found

Breach holds no records for joinapart.co right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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

Sitestream operates in the niche market of web performance optimization with a sustainability angle, targeting environmentally conscious website operators. Its competitive advantage lies in its proprietary image streaming engine that dynamically selects optimal image formats for performance and data savings. The SaaS business model with easy integration supports scalable adoption. Partnerships with brands like Eytys and others enhance credibility. The company appears to be a small-sized entity with a clear focus on technology innovation and environmental impact. Revenue streams likely include subscription fees for usage tiers. The partnership ecosystem includes related domains for authentication and client services. Growth indicators include a professional website and active social media presence. Strategic observations suggest potential for expansion into broader web optimization services and enhanced compliance frameworks.

Security posture

Sitestream demonstrates a mature security posture with mandatory HTTPS, absence of exposed sensitive data, and use of some security headers. However, the empty Content-Security-Policy header and lack of published security or incident response policies indicate gaps in comprehensive security governance. No vulnerability disclosure or security.txt files were found, limiting transparency for security researchers. The site does not implement cookie consent mechanisms, which may impact GDPR compliance. Overall, the security culture appears cautious but could benefit from formalized policies and improved header configurations. The risk of vulnerabilities is low based on current visible data, but proactive measures are recommended to maintain trust and compliance.

Recommendations

  1. Implement a robust Content-Security-Policy header to mitigate XSS and related attacks.
  2. Publish a dedicated security policy and incident response contact information to improve transparency and readiness.
  3. Add a cookie consent mechanism to ensure GDPR compliance and user privacy control.
  4. Enhance accessibility features to improve inclusivity and compliance with standards.
  5. Consider establishing a vulnerability disclosure program or security.txt file to engage with security researchers.

Contact details published on the site

Addresses
Legal name
SeenThis AB
Registration number
556920-5452
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SeenThis AB
Description
Sitestream provides a technology solution to stream website images efficiently to reduce unnecessary data transfer, improve user experience, and reduce internet carbon emissions.
Key services
Image format optimization, Instant image display technology, Seamless integration via WordPress plugin or script
Content quality
good
Branding
consistent

Technology

Stack
Svelte, JavaScript, CSS
Frameworks
Svelte
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Tracking level
minimal
Privacy practices
good

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 challenges.
  2. Content is focused on sustainable web image streaming technology.
  3. Contact information is provided but no phone numbers found.
  4. No forms detected on the homepage HTML provided.
  5. No explicit security or incident response policies published.
  6. No analytics or advertising scripts detected in the HTML.
  7. Social media presence includes Instagram, Facebook, and LinkedIn.
  8. Company legal info and registration number displayed in footer.
Technical notes

Notes

The website is built using the Svelte framework, leveraging modern JavaScript and CSS assets with module preloading for performance optimization. Hosting appears to utilize a CDN (cdn.sitestream.co) for image and asset delivery, contributing to fast load times and good mobile optimization. The site includes well-structured meta tags and Open Graph data for SEO and social sharing. No CMS was detected, suggesting a custom or static site architecture. The absence of analytics or advertising scripts indicates minimal tracking and a focus on privacy. Technical debt appears low with modern practices, though security header implementation could be improved. Overall, the technical infrastructure supports a fast, responsive, and professional user experience.
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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