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Security report for quilljs.com

Slab · Technology · N/a

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

63/100

Risk levelMedium

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

Quill is a mature, open source rich text editor project founded in 2014 and maintained by Slab. It targets developers and businesses needing a customizable WYSIWYG editor with a modular architecture and expressive API. The website demonstrates a professional and modern design, leveraging Next.js and various JavaScript libraries to deliver a fast, accessible, and mobile-optimized experience. The project enjoys strong market presence and trust, evidenced by its large GitHub community and adoption by major companies such as LinkedIn, Figma, and Calendly. Security posture is solid with HTTPS and domain transfer protections, though it lacks explicit security policies and DNSSEC. Privacy compliance is weak due to missing privacy and cookie policies and no consent mechanism. Overall, the site is trustworthy and technically sound but could improve transparency and compliance documentation.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 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

8 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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • 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

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

Keep watching quilljs.com

This scan found 23 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
25
Email security
70
DNS health
70
Network security
100
GDPR outside view
35
Average
63

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

Quill operates as an open source software project under Slab, serving a niche of developers and enterprises requiring rich text editing capabilities. Its business model likely includes community-driven development and potential enterprise support or consulting via Slab. The project benefits from a strong ecosystem and partnerships with well-known technology companies, enhancing its market position. The website content and branding are consistent and professional, supporting a credible business presence. However, the absence of direct contact information and formal policies may limit some business credibility aspects. Growth potential is supported by ongoing releases and active GitHub engagement.

Security posture

The website enforces HTTPS and uses Cloudflare as registrar and DNS provider, providing a baseline of security. The domain status clientTransferProhibited adds protection against unauthorized transfers. However, DNSSEC is not enabled, which is a recommended security enhancement. No explicit security headers were detected in the HTML content, and there is no published security policy or incident response information. No vulnerability disclosure or security.txt file is present. The site does not expose sensitive data or vulnerable libraries visibly. Google Analytics is used for tracking without visible cookie consent, which may raise privacy compliance concerns. Overall, the security posture is moderate but could be improved with better policy transparency and technical controls.

Recommendations

  1. Enable DNSSEC to improve DNS security and prevent spoofing.
  2. Publish a comprehensive privacy policy and cookie policy with GDPR compliance details.
  3. Implement a cookie consent mechanism to comply with privacy regulations.
  4. Add a security policy and incident response contact information to build trust.
  5. Include vulnerability disclosure guidelines and a security.txt file for responsible reporting.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Slab
Description
Quill is a free, open source WYSIWYG editor built for the modern web. It offers a modular architecture and expressive API, allowing complete customization to fit any need.
Key services
Rich text editing, Modular editor architecture, API for customization
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React (Next.js), KaTeX, Highlight.js, DocSearch, CDNJS, jsDelivr
Frameworks
Next.js
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Domain status clientTransferProhibited
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Marketing tools
DocSearch
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional open source project site for a rich text editor.
  2. No privacy, cookie, or terms of service policies found on the main page.
  3. No contact emails or phone numbers explicitly provided on the homepage.
  4. Strong branding and trust signals from GitHub and major user logos.
  5. Modern tech stack with Next.js and CDN usage.
  6. Good mobile and accessibility support.
  7. Uses Google Analytics for tracking without visible cookie consent mechanism.
  8. No explicit security or incident response policies published.
  9. WHOIS data shows domain is stable and legitimate.
Technical notes

Notes

The website is built on a modern JavaScript stack using Next.js, KaTeX for math rendering, Highlight.js for code syntax highlighting, and DocSearch for search functionality. It leverages CDN services such as jsDelivr and Cloudflare for performance and reliability. The site is well-structured with valid HTML and CSS, optimized for mobile devices, and accessible. Performance is fast with prefetching and deferred script loading. SEO is supported by proper meta tags and Open Graph data. There is no detected CMS, indicating a custom or static site generation approach. Technical risks are minimal but could include reliance on third-party scripts and lack of advanced security headers.
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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