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Security report for bsky.social

Bluesky · Technology · N/a

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

Security score

69/100

Risk levelMedium

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

Bluesky is an innovative social media platform focused on building an open, decentralized social internet. It offers users control over their timelines and content moderation, fostering creativity and community engagement. The platform supports a growing developer ecosystem with public APIs and open source projects, positioning itself as a forward-thinking alternative to traditional social networks. Technically, Bluesky employs modern web technologies including Next.js and integrates analytics via Google Tag Manager, delivering a fast, mobile-optimized, and accessible user experience. Security posture is solid with HTTPS and no visible vulnerabilities, though improvements in security headers and incident response transparency are recommended. Privacy compliance is limited due to missing explicit policies and consent mechanisms. Overall, Bluesky presents a professional, trustworthy, and technically mature platform with room for enhanced privacy and security disclosures.

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

6 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 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';…

  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

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

Keep watching bsky.social

This scan found 21 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
77
Security headers
30
Email security
70
DNS health
85
Network security
100
GDPR outside view
53
Average
69

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

Bluesky occupies a unique market position as a public benefit corporation aiming to decentralize social media. Its business model revolves around an open network and developer ecosystem, enabling third-party projects and custom feeds. The platform targets general internet users seeking more control and openness in social networking. Strong media coverage and partnerships with projects like AT Protocol and bsky.app enhance its credibility. The company emphasizes transparency and community involvement, leveraging open source and public documentation to foster trust. Growth indicators include multiple featured projects and active GitHub discussions. Strategic partnerships and a focus on developer engagement suggest a sustainable ecosystem approach.

Security posture

Bluesky demonstrates a mature security posture with enforced HTTPS and no exposed sensitive data. However, the absence of key security headers such as Content-Security-Policy and lack of published security policies or incident response contacts indicate areas for improvement. No vulnerability disclosure or security.txt files were found, which could hinder coordinated vulnerability management. Privacy compliance is basic, with no visible cookie consent mechanisms or detailed privacy policies on the analyzed page. The platform would benefit from enhanced transparency around data protection and incident handling to align with best practices and regulatory requirements.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with user consent mechanisms to improve GDPR compliance.
  2. Add security headers like Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen security posture.
  3. Publish a security incident response policy and provide dedicated contact channels for security issues.
  4. Create and maintain a vulnerability disclosure program or security.txt file to facilitate responsible reporting.
  5. Enhance transparency around data retention and protection practices to build user trust and meet compliance standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bluesky
Description
Bluesky is a social media platform aiming to build an open foundation for the social internet, providing users with community, creativity, and fun. It emphasizes user control over timelines, moderation, and content feeds.
Key services
Social networking, Customizable timelines and feeds, Open developer APIs, Community moderation tools
Content quality
excellent
Branding
consistent

Technology

Stack
React (Next.js), JavaScript, Google Tag Manager, Web fonts (woff2), SVG graphics
Frameworks
Next.js
Platforms
Web, iOS (App Store), Android (Google Play)
Performance
fast
Mobile
excellent
Accessibility
good
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

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges
  2. No privacy, cookie, or terms of service policies explicitly found on the about page
  3. Contact emails are provided in footer with company domains
  4. Strong emphasis on open social networking and developer ecosystem
  5. Multiple external links to partner and related projects
  6. Use of modern web technologies and frameworks
  7. No phone numbers or physical addresses found
  8. No security.txt or vulnerability disclosure information found
  9. No explicit security policy or incident response contacts found
  10. Google Tag Manager used for analytics and tracking
Technical notes

Notes

The website is built using modern web technologies, primarily Next.js, delivering a performant and mobile-optimized experience. The use of SVG logos and web fonts contributes to a polished design. Google Tag Manager is employed for analytics and tracking, indicating a moderate level of user data collection. The site lacks a CMS, suggesting a custom or static site generation approach. No hosting provider details were detected. Performance is fast with good SEO and accessibility practices observed. Technical risks are minimal, but the absence of some security headers and privacy controls represents potential areas for technical debt and compliance risk.
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. 68/100Medium8 findings · partial scanView report
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