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Security report for mpv.io

mpv · Technology · Iceland

Medium risk. 10 critical or high findings in Email security, Security headers and 2 other checks.

Security score

54/100

Risk levelMedium

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

mpv.io is the official website for mpv, a free, open source, and cross-platform media player primarily targeted at users comfortable with command line interfaces and developers seeking embeddable media playback solutions. The project is mature, founded in 2013, and maintains an active development community with a focus on high quality video output, scripting capabilities, and hardware acceleration. The website effectively communicates the core features and provides links to installation instructions, source code, and community resources. Technically, the site is well implemented with modern web technologies, fast performance, and mobile optimization. Security posture is good with HTTPS enforced and use of subresource integrity for external scripts, though it lacks some security headers and formal security policies. Privacy compliance is minimal with no visible privacy or cookie policies, and no contact information is provided, which may impact user trust and regulatory compliance. Overall, the site is professional and trustworthy for its niche audience 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

10 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 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';…

  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

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

Keep watching mpv.io

This scan found 27 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

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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
15
Email security
40
DNS health
60
Network security
100
GDPR outside view
35
Average
54

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

mpv operates in the technology sector as an open source software project focused on media playback. Its business model revolves around free software distribution and community-driven development rather than direct monetization. The project targets technically proficient users and developers needing a versatile media player with scripting and embedding capabilities. The domain age and active GitHub presence indicate a stable and ongoing project. The lack of formal business contact details and privacy policies suggests a community-driven rather than commercial entity. The project benefits from partnerships with platforms like GitHub and uses Cloudflare for DNS services. Growth indicators include active issue tracking and community engagement. Strategic observations include the opportunity to enhance user trust by publishing privacy and security policies and improving contact transparency.

Security posture

The website demonstrates a moderate to strong security posture with HTTPS enabled and integrity checks on external scripts. However, it lacks several recommended security headers such as Content-Security-Policy and X-Frame-Options, which could mitigate certain attack vectors. The absence of a published security policy or incident response contact limits transparency and preparedness for security incidents. No vulnerabilities or exposed sensitive data were detected in the HTML content. The WHOIS data shows privacy protection for the registrant, which is common and justified for open source projects. Overall, the security maturity is good but could be improved by adopting additional headers, publishing security policies, and enabling DNSSEC.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a comprehensive privacy policy and cookie policy to improve GDPR compliance and user trust.
  3. Add security headers such as Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options to strengthen security posture.
  4. Provide clear contact information including security incident response contacts or a security.txt file to facilitate vulnerability reporting.
  5. Consider implementing a vulnerability disclosure program to encourage responsible reporting and improve security culture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
mpv
Description
mpv is a free, open source, and cross-platform media player for the command line supporting a wide variety of media formats, codecs, and subtitle types.
Key services
Media playback, Scripting capabilities, High quality video output, GPU video decoding, Embeddable C API
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS, JavaScript, Zepto.js, OpenGL, Vulkan, D3D11
Platforms
Windows, Linux, Unix, BSD, macOS
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of subresource integrity (SRI) for external scripts

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

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 challenges.
  2. No privacy, cookie, or terms of service policies found on the site.
  3. No contact emails or phone numbers explicitly provided.
  4. Social media presence includes GitHub and Twitter links.
  5. Website uses Cloudflare DNS but DNSSEC is not enabled.
  6. No security.txt or vulnerability disclosure information found.
  7. Site content is professional, relevant, and well structured.
  8. No advertising or tracking technologies detected.
  9. No forms or data collection fields present on the homepage.
  10. SSL/TLS is properly configured with HTTPS enforced.
Technical notes

Notes

The website uses a clean and modern tech stack including HTML5, CSS, and JavaScript with Zepto.js for lightweight DOM manipulation. It leverages external CDNs with subresource integrity for security. The site is hosted behind Cloudflare DNS, improving availability and performance, though DNSSEC is not enabled. The site is mobile optimized and loads quickly with no broken elements detected. There is no CMS detected, indicating a likely static or custom-built site. The absence of analytics or tracking scripts suggests a privacy-conscious approach. Technical debt appears low with active development signals from linked GitHub repositories. Opportunities exist to improve accessibility and SEO further by adding ARIA roles and richer metadata. Overall, the technical implementation is solid and well suited for the target audience.
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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