Skip to main content

Security report for roundcube.net

Roundcube Webmail Dev Team · Technology · N/a

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

Security score

68/100

Risk levelMedium

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

Roundcube.net is the official website for Roundcube, a free and open source webmail software project established in 2004. The site provides information about the software, including features, downloads, news updates, and community resources. The project targets users and developers interested in a browser-based IMAP email client with a modern interface and extensibility via plugins. The website is well maintained with regular news updates and active GitHub and DockerHub presence, indicating a mature open source ecosystem. Technically, the website uses modern frontend technologies such as Bootstrap 5 and FontAwesome, served via CDN with Cloudflare DNS. HTTPS is enforced via client-side redirect, and the site is mobile optimized with good accessibility and SEO practices. No CMS is detected, suggesting a custom or static site approach. The site does not employ advertising or tracking services, reflecting a privacy-conscious design. From a security perspective, the site enforces HTTPS and mentions XSS protection in its features. However, no explicit security headers were detected, and there is no published security policy or incident response information. DNSSEC is not enabled, which is a recommended improvement. The domain is long-standing and consistent with the project's history, enhancing trustworthiness. Overall, roundcube.net is a professional, trustworthy, and technically sound website supporting a reputable open source project. Strategic improvements include publishing privacy and security policies, enabling DNSSEC, and adding cookie consent mechanisms to enhance compliance and user trust.

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

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 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

    • 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 roundcube.net

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.

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.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
50
Email security
65
DNS health
80
Network security
100
GDPR outside view
35
Average
68

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

Roundcube operates as an open source software project providing a webmail client primarily for technology users and organizations requiring IMAP email access via browser. Its business model is based on free software distribution with community contributions and plugin ecosystem support. The project holds a strong market position as a widely recognized open source webmail client with a dedicated user base. Revenue streams are likely indirect, possibly through donations or sponsorships, as no commercial offerings are evident. The target customers include IT professionals, hosting providers, and end users seeking a customizable webmail solution. The project maintains active partnerships with GitHub and DockerHub for code and container distribution. Growth indicators include recent news updates and version releases. The ecosystem is community-driven with no parent or subsidiary companies identified.

Security posture

The website demonstrates a moderate to high security maturity level with enforced HTTPS and domain transfer protection. The mention of XSS attack protection in the software features indicates awareness of common web vulnerabilities. However, the absence of DNSSEC, security headers, and published security policies or incident response plans reveals gaps in comprehensive security posture. No vulnerability disclosure or security.txt files were found, limiting transparency for security researchers. The lack of cookie consent mechanisms also indicates partial privacy compliance. Overall, the security culture appears functional but could benefit from formalized policies and enhanced technical controls to meet higher compliance standards such as GDPR or NIS2.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and trust.
  2. Publish a dedicated security policy and incident response information on the website.
  3. Implement a cookie policy and consent mechanism to comply with privacy regulations.
  4. Add standard security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  5. Create and publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Roundcube Webmail Dev Team
Description
Free and open source webmail software for the masses, written in PHP
Key services
Webmail software, IMAP client, Plug-in API and extensions
Content quality
good
Branding
consistent

Technology

Stack
PHP, IMAP, Bootstrap 5, FontAwesome, Cloudflare DNS
Frameworks
Bootstrap
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced via script redirect
  • XSS attack protection mentioned
  • Domain status clientTransferProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

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 challenge
  2. Content is focused on open source webmail software
  3. No privacy or cookie policy explicitly found except license page
  4. No contact form or phone number found; only email in meta author tag
  5. No security.txt or vulnerability disclosure page detected
  6. Modern frontend technologies used with good mobile support
  7. No advertising or tracking scripts detected
  8. Domain is well aged and stable with Cloudflare DNS
  9. HTTPS is enforced via client-side redirect script
Technical notes

Notes

The website is built using a modern and lightweight technology stack including PHP for the backend software, Bootstrap 5 for responsive frontend design, and FontAwesome for icons. Content is served via CDN providers jsDelivr and Google Fonts, ensuring fast load times and global availability. DNS is managed by Cloudflare, providing resilience and performance benefits. The site enforces HTTPS via client-side redirect, though server-side enforcement would be preferable. No CMS or heavy frameworks were detected, indicating a custom or static site approach that reduces attack surface. The site is mobile optimized with good accessibility and SEO metadata. Technical risks include lack of DNSSEC and missing security headers, which should be addressed to reduce potential attack vectors.
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

Reviews of this site

Share your experience with roundcube.net. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review roundcube.net.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.