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Security report for addevent.com

AddEvent · Technology · N/a

Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

66/100

Risk levelMedium

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

AddEvent is a technology company specializing in calendar event sharing and management tools, offering services such as add to calendar buttons, RSVP collection, subscription calendars, and embeddable calendars. The company targets businesses and organizations that require seamless event sharing and engagement solutions, positioning itself as a market leader with over 300,000 customers including major platforms like Google and Microsoft. The website demonstrates a high level of digital maturity with modern technologies, responsive design, and integration with analytics and payment services. Security posture is solid with HTTPS and secure libraries, though explicit security policies and incident response contacts are absent. The absence of WHOIS registration data is a notable gap, impacting domain trustworthiness. Overall, the site is professional and trustworthy, but improvements in privacy compliance and transparency are recommended.

Scanned

This is an earlier scan of addevent.com. View the latest report

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

7 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"

  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

    • 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 addevent.com

This scan found 22 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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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
30
Email security
70
DNS health
85
Network security
100
GDPR outside view
35
Average
66

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

AddEvent operates a SaaS business model focused on event calendar integration and engagement tools. Its competitive advantage lies in its extensive integrations, trusted brand, and comprehensive feature set including automated event updates and analytics. Revenue streams likely include subscription plans and enterprise solutions. The target customers are marketers, event organizers, and developers seeking to increase event attendance and engagement. The company maintains a strong partnership ecosystem with major technology platforms. Strategic observations include the need to enhance privacy and security transparency to maintain trust and comply with evolving regulations.

Security posture

The website exhibits a mature security posture with enforced HTTPS, use of secure third-party libraries, and no visible sensitive data exposure. However, it lacks visible security headers in the HTML source and does not provide a public security policy or incident response contact information. There is no evidence of vulnerability disclosure programs or security.txt files. Compliance with GDPR and cookie consent mechanisms is not evident, which may pose regulatory risks. The security culture appears functional but could benefit from enhanced transparency and formalized policies to improve stakeholder confidence and regulatory compliance.

Recommendations

  1. Publish comprehensive privacy and cookie policies with clear GDPR compliance and consent mechanisms.
  2. Implement and document security headers such as Content-Security-Policy, X-Frame-Options, and Referrer-Policy.
  3. Provide a public security policy and incident response contact channels (e.g., security@ or abuse@ emails).
  4. Establish a vulnerability disclosure program and publish a security.txt file to encourage responsible reporting.
  5. Enhance accessibility features and continue optimizing mobile experience to maintain high usability standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
AddEvent
Description
AddEvent provides add to calendar and event tools for websites and newsletters, including event RSVP, email campaign integration, and embeddable calendars. Trusted by over 300,000 companies including Google, Microsoft, Salesforce, and HubSpot.
Key services
Add to calendar buttons and links, RSVP collection, Subscription calendars, Embeddable calendars, Automated event sharing, Event landing pages, Analytics and integrations
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, CSS3, HTML5, Google Fonts, Slick Carousel, Stripe API, Amplitude Analytics, FirstPromoter, AddEvent proprietary JS libraries
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure third-party libraries
  • No visible vulnerable libraries

Analytics and tracking

Services
Amplitude
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Amplitude, FirstPromoter
Marketing tools
Stripe, Amplitude, FirstPromoter
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 rich content and professional design.
  2. No explicit privacy, cookie, or terms of service pages found in provided HTML snippet.
  3. No contact emails or phone numbers explicitly found in HTML content.
  4. Strong branding and market positioning as a calendar event service provider.
  5. Use of modern JavaScript libraries and analytics tools.
  6. No visible security policy or incident response information.
  7. WHOIS data unavailable, which reduces trust in domain registration transparency.
Technical notes

Notes

The website uses a modern technology stack including JavaScript, CSS3, and HTML5, with integrations of analytics (Amplitude), marketing (FirstPromoter), and payment processing (Stripe). It employs Google Fonts and slick carousel for UI components. The site is well-optimized for performance and mobile responsiveness, with clean and structured HTML and CSS. No CMS is explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not discernible from the HTML. The technical implementation supports a fast, accessible, and SEO-friendly user experience, though improvements in security header implementation and privacy compliance are advised.
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. 69/100 +1Medium30 findingsView report
  2. 68/100 −1Medium31 findingsView report
  3. 69/100Medium30 findingsView report
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