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SGSiteGraph

stuvia.com

ERROR: The request could not be satisfied

Last scanned Jul 26, 2026, 5:17 AM · 2 views

79

Overall score

Fair

Summary

This website uses Apache hosted on AWS behind CloudFront CDN. SEO is fair (70/100) and accessibility is good (85/100). Security scores good (75/100) and performance excellent (90/100). Top issue: Missing meta description.

United States
Hosted on AWS

Top issues to fix

10 issues found · 4 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • 6 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+4 more issues — details in the sections below.

70

SEO

4 issue(s) found

90

Performance

1.42 s

75

Security

HTTPS & header checks

85

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Contact

Email, phone, and address published on this site's own pages.

Source: https://www.stuvia.com:443/about/contact

Meta tags

Title
ERROR: The request could not be satisfied
Description
Canonical
Language
Charset
iso-8859-1
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

PHPApache

Hosting & CDN

Hosting provider
AWS
CDN provider
CloudFront
IP address
18.66.41.38
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 18.66.41.38
  • 18.66.41.40
  • 18.66.41.22
  • 18.66.41.5
AAAA—
MX—
TXT—
NS—
CAA
  • 0 issue "amazon.com"
  • 0 issue "sectigo.com"
  • 0 issue "amazontrust.com"
  • 0 issue "letsencrypt.org"
  • 0 issue ";"
  • 0 issue "amazonaws.com"
  • 0 issue "awstrust.com"
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
www.stuvia.com
Valid from
Mar 22, 2026
Valid to
Oct 5, 2026
Days until expiry
71
SAN domains
www.stuvia.com, www.stuvia.de, fr.stuvia.be, www.stuvia.fr, www.stuvia.nl, www.stuvia.es, www.stuvia.co.za, www.stuvia.be, www.stuvia.co.uk

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 6 cookie(s) observed

Content & assets

Headings

H1 1 · H2 1 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 0 B

Page size

221 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
146
sitemap.xml
Found
URLs in sitemap
-1

SEO issues

  • Missing meta description
  • Missing canonical link
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags

Accessibility issues

  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://stuvia.com
Final URL
https://www.stuvia.com:443/
HTTP status
200
HTTP version
HTTP/2
Response time
1.42 s
HTML size
221 KB
Redirect chain
https://stuvia.com → https://www.stuvia.com:443/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does stuvia.com use?
stuvia.com is built with PHP, Apache.
Is stuvia.com secure (HTTPS)?
Yes. stuvia.com uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 5, 2026.
Who hosts stuvia.com?
stuvia.com is hosted on AWS, behind CloudFront CDN.
What is stuvia.com's SEO score?
stuvia.com scored 70/100 for SEO in the latest analysis (fair).
What is stuvia.com's overall website score?
stuvia.com has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.