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Security report for heroicons.com

Tailwind Labs · Technology · N/a

Medium risk. 8 critical or high findings in Email security, Security headers and 2 other checks.

Security score

63/100

Risk levelMedium

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

Heroicons is an open source SVG icon library created and maintained by Tailwind Labs, the makers of Tailwind CSS. The website offers a comprehensive set of 316 hand-crafted icons under the permissive MIT license, targeting developers and designers who use Tailwind CSS or modern frontend frameworks like React and Vue. The site is well-positioned in the technology sector as a popular resource for UI/UX assets, with a small but focused business model centered on open source community engagement and design tooling. Technically, the website is built using modern web technologies including React, Vue, and Next.js, styled with Tailwind CSS. It is hosted with Cloudflare DNS and served over HTTPS, ensuring good performance, mobile optimization, and accessibility. The site lacks a CMS and does not appear to use advertising or tracking services, reflecting a clean and developer-friendly infrastructure. From a security perspective, the site benefits from HTTPS and absence of exposed sensitive data or vulnerable libraries. However, it lacks explicit security headers and formal policies such as privacy, cookie, or terms of service documents, which are important for compliance and user trust. No incident response or vulnerability disclosure mechanisms are publicly available. Overall, Heroicons presents a low-risk profile with strong technical and business credibility but could improve privacy compliance and security transparency. Strategic recommendations include publishing privacy and cookie policies, adding security headers, and providing a vulnerability disclosure channel to enhance trust and compliance.

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. 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 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 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 heroicons.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

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Full report

€39.90one-time

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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
30
Email security
60
DNS health
75
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

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 heroicons.com, from OffSeq Breach.

No leaked records found

Breach holds no records for heroicons.com 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

Heroicons operates as a niche open source project within the technology sector, specifically targeting frontend developers and designers. Its competitive advantage lies in its association with Tailwind CSS, a widely adopted utility-first CSS framework, and its provision of high-quality, free SVG icons under an MIT license. The business model is community-driven, relying on open source contributions and ecosystem integration rather than direct monetization. The target customer segment includes web developers, UI/UX designers, and companies adopting Tailwind CSS. Growth indicators include a mature domain age since 2016 and active GitHub presence. The partnership ecosystem includes GitHub and Figma for distribution and design collaboration. The company maintains a focused operation without subsidiaries or parent companies.

Security posture

The security maturity of Heroicons is moderate. The site enforces HTTPS and avoids exposing sensitive data or vulnerable libraries, which are positive indicators. However, the absence of security headers such as Content-Security-Policy and lack of a security.txt or vulnerability disclosure policy indicate gaps in security best practices. No contact channels for incident response or abuse reporting are provided, limiting responsiveness to security incidents. Privacy compliance is weak due to missing privacy and cookie policies. The overall security culture appears informal, typical for open source projects without dedicated corporate governance. Business impact of these gaps is low given the nature of the service, but improvements would enhance user trust and compliance.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy to improve GDPR compliance and user trust.
  2. Implement security headers including Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security.
  3. Add a security.txt file and establish a vulnerability disclosure process to facilitate responsible reporting.
  4. Provide clear contact information for security incidents and abuse reports.
  5. Regularly audit dependencies and update libraries to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tailwind Labs
Description
Beautiful hand-crafted SVG icons, by the makers of Tailwind CSS.
Key services
SVG icon sets, React and Vue icon libraries, Figma design files
Content quality
excellent
Branding
consistent

Technology

Stack
React, Vue, SVG, Next.js
Frameworks
Tailwind CSS
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data
  • No vulnerable libraries detected

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking
  2. No explicit privacy, cookie, or terms of service policies found
  3. No contact emails or phone numbers publicly listed
  4. Strong association with Tailwind CSS and open source community
  5. No advertising or tracking scripts detected
  6. Good technical implementation with modern frameworks and fast performance
Technical notes

Notes

The website uses a modern tech stack with React, Vue, and Next.js frameworks, styled by Tailwind CSS. It is hosted with Cloudflare DNS and served over HTTPS, ensuring good performance and security. The site is mobile optimized and accessible, with semantic HTML and ARIA attributes. No CMS is detected, indicating a custom or static site generation approach. The absence of advertising and tracking scripts contributes to fast loading times and privacy. Technical debt appears low, but the lack of security headers and formal policies suggests areas for modernization. Overall, the infrastructure supports a high-quality user experience with opportunities to enhance security and compliance.
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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