shadowserver.org
The Shadowserver Foundation
Last scanned Aug 2, 2026, 5:00 AM · 7 views
Overall score
Fair
Summary
The Shadowserver Foundation is a nonprofit security organization working altruistically behind the scenes to make the Internet more secure for everyone. This website uses WordPress. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: No H1 heading found.
The Shadowserver Foundation is a nonprofit security organization working altruistically behind the scenes to make the Internet more secure for everyone.
Top issues to fix
10 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+4 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
452 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-3 overall since Jul 26, 2026
- Overall
- 79
- SEO
- 65
- Security
- 65
- Performance
- 100
- Accessibility
- 90
Organization
Company details published in this site's own structured data.
The Shadowserver Foundation is a nonprofit security organization working altruistically behind the scenes to make the Internet more secure for everyone.
Meta tags
- Title
- The Shadowserver Foundation
- Description
- The Shadowserver Foundation is a nonprofit security organization working altruistically behind the scenes to make the Internet more secure for everyone.
- Canonical
- https://www.shadowserver.org/
- Language
- en-US
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- max-image-preview:large
- Manifest
- https://www.shadowserver.org/wp-content/themes/shadowserver/build/images/favicons/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Sectigo Limited
- Subject
- shadowserver.org
- Valid from
- Jan 2, 2026
- Valid to
- Feb 2, 2027
- Days until expiry
- 184
- SAN domains
- shadowserver.org, blog.shadowserver.org, www.shadowserver.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 2 · H3 1
Links
17 internal · 6 external · 20 broken
Images
24 total · 1 missing alt
Scripts / Styles
41 scripts · 20 stylesheets
JS / CSS size
5.8 KB · 12.5 KB
Page size
41.7 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://shadowserver.org
- Final URL
- https://www.shadowserver.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 452 ms
- HTML size
- 41.7 KB
- Redirect chain
- https://shadowserver.org → https://www.shadowserver.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does shadowserver.org use?
- shadowserver.org is built with WordPress, Google Analytics.
- Is shadowserver.org secure (HTTPS)?
- Yes. shadowserver.org uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Feb 2, 2027.
- Who hosts shadowserver.org?
- Hosting provider information for shadowserver.org is not available yet.
- What is shadowserver.org's SEO score?
- shadowserver.org scored 65/100 for SEO in the latest analysis (fair).
- What is shadowserver.org's overall website score?
- shadowserver.org has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.
- Has shadowserver.org's score changed over time?
- shadowserver.org's overall score has declined by 3 points (from 82 to 79) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card