Security checks — sorted by severity
Security Headers
2/5 security headers present. Missing: CSP, Referrer-Policy, Permissions-Policy. This exposes the application to clickjacking, MIME-sniffing, and other client-side attacks.
2/5 security headers present. Missing: CSP, Referrer-Policy, Permissions-Policy. This exposes the application to clickjacking, MIME-sniffing, and other client-side attacks.
MX Records & Mail Provider
Strengths: Mail handled by Microsoft 365; 1 MX record(s) configured. Issues: Only 1 MX record — no failover if primary mail server is unavailable.
Strengths: Mail handled by Microsoft 365; 1 MX record(s) configured. Issues: Only 1 MX record — no failover if primary mail server is unavailable.
MTA-STS & TLS Reporting
Issues: No MTA-STS configured — email in transit is vulnerable to TLS downgrade attacks. Sending servers cannot verify that your mail server requires TLS; No TLSRPT record — TLS delivery failures won't be reported to domain owner.
Issues: No MTA-STS configured — email in transit is vulnerable to TLS downgrade attacks. Sending servers cannot verify that your mail server requires TLS; No TLSRPT record — TLS delivery failures won't be reported to domain owner.
DNS CAA Records
No CAA records found. Without CAA, any Certificate Authority can issue certificates for this domain. Adding CAA records restricts issuance to authorized CAs only, reducing the risk of misissued certificates.
No CAA records found. Without CAA, any Certificate Authority can issue certificates for this domain. Adding CAA records restricts issuance to authorized CAs only, reducing the risk of misissued certificates.
DNS Configuration
Strengths: 2 nameservers configured (dns2.registrar-servers.com., dns1.registrar-servers.com.); 1 MX records present; Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
Strengths: 2 nameservers configured (dns2.registrar-servers.com., dns1.registrar-servers.com.); 1 MX records present; Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
DMARC / Email Security
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (domain may use custom selectors — this is not a confirmed gap).
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (domain may use custom selectors — this is not a confirmed gap).
security.txt (RFC 9116)
No security.txt found. Publishing a security.txt at /.well-known/security.txt is the industry standard (RFC 9116) for vulnerability disclosure policies. Its absence may indicate a less mature security program.
No security.txt found. Publishing a security.txt at /.well-known/security.txt is the industry standard (RFC 9116) for vulnerability disclosure policies. Its absence may indicate a less mature security program.
TLS Protocol Support
Strengths: TLS 1.3 supported; TLS 1.2 supported; TLS 1.3 supported (strongest). Protocol support: TLS 1.3: Yes, TLS 1.2: Yes, TLS 1.1: No, TLS 1.0: No.
Strengths: TLS 1.3 supported; TLS 1.2 supported; TLS 1.3 supported (strongest). Protocol support: TLS 1.3: Yes, TLS 1.2: Yes, TLS 1.1: No, TLS 1.0: No.
TLS Configuration
TLSv1.3 negotiated with TLS_AES_128_GCM_SHA256 (128-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
TLSv1.3 negotiated with TLS_AES_128_GCM_SHA256 (128-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
HSTS Header
HSTS enabled: max-age=63072000s (730 days) with includeSubDomains and preload. Meets best-practice configuration.
HSTS enabled: max-age=63072000s (730 days) with includeSubDomains and preload. Meets best-practice configuration.
Cookie Security
No cookies set on the homepage response. No cookie security flags to evaluate.
No cookies set on the homepage response. No cookie security flags to evaluate.
Known Breaches
No known breaches found in public disclosure databases.
No known breaches found in public disclosure databases.
CVE Exposure
Detected technologies: AmazonS3, Proxy/CDN. (Proxy/CDN detected but excluded from CVE matching — upstream infrastructure). No version information exposed — CVE matching not possible (this is good practice).
Detected technologies: AmazonS3, Proxy/CDN. (Proxy/CDN detected but excluded from CVE matching — upstream infrastructure). No version information exposed — CVE matching not possible (this is good practice).
Certificate Hygiene
Strengths: Certificate valid, 180 days remaining; Issued by Amazon. Note: Wildcard certificate in use (*.domain) — covers all subdomains. Common practice; worth noting that compromise would affect all subdomains.
Strengths: Certificate valid, 180 days remaining; Issued by Amazon. Note: Wildcard certificate in use (*.domain) — covers all subdomains. Common practice; worth noting that compromise would affect all subdomains.
Recommended actions
1+ items
Steps to improve drop.io's security grade, ranked by impact.
1
Add missing security headers (CSP, Referrer-Policy, Permissions-Policy)
3 of 5 recommended security headers are missing on drop.io: CSP, Referrer-Policy, Permissions-Policy. These headers protect against clickjacking, MIME-sniffing, and unauthorized browser feature access. Adding them is a server configuration change with no application code changes required.
PCI-DSS 4.0Req 6.4.1
Security headers are required application controls
OWASPSecure Headers
Recommended baseline for web applications
How to fix this
1
Add a Content-Security-Policy header. Safe starting value (works with Google Fonts and inline styles/scripts): default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; script-src 'self' 'unsafe-inline'; upgrade-insecure-requests. Test your site after adding it, then tighten over time by removing 'unsafe-inline'.
2
Add: Referrer-Policy: strict-origin-when-cross-origin
3
Add: Permissions-Policy: camera=(), microphone=(), geolocation=()
4
Verify with: curl -sI https://drop.io | grep -iE 'content-security|x-frame|x-content|referrer|permissions'
See all 2 remaining recommendations
Enter your work email to unlock the full action plan.
No spam. We only send security-related updates.
Report unlocked.
AI Summary
What this means
drop.io scored 80/100, demonstrating a strong security posture. Minor improvements are noted below.
Critical gaps in: Security Headers. Positive signals: TLS Protocol Support, TLS Configuration, HSTS Header all passed.
3 action items identified, including 0 critical. The issues are configuration gaps, not architectural problems. A focused remediation effort of 2–5 days could address all findings.
How drop.io compares
Grade distribution across 2678 companies we've scanned. drop.io scores better than 64% of them.
88
A+
28
A
194
A-
200
B+
75
B
376
B-
137
C+
117
C
347
C-
123
D+
96
D
265
D-
632
F
drop.io — Grade B- (80/100)
2678 companies scanned
At a glance
Key data points from the scan.
TLS Version
TLSv1.3
TLSv1.3 negotiated with TLS_AES_128_GCM_SHA256 (128-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
DMARC Policy
p=quarantine
Strengths: DMARC policy set to quarantine. Issues: No SPF record found; No DKIM records found for common selectors (domain may use custom selectors — this is not a confirmed gap).
SPF Record
Missing
No SPF record found.
Security Headers
2/5 present
Missing: CSP, Referrer-Policy, Permissions-Policy
HSTS
Enabled
HSTS enabled: max-age=63072000s (730 days) with includeSubDomains and preload. Meets best-practice configuration.
SSL Certificate
Valid
Strengths: Certificate valid, 180 days remaining; Issued by Amazon. Note: Wildcard certificate in use (*.domain) — covers all subdomains. Common practice; worth noting that compromise would affect all subdomains.
DNSSEC
Not enabled
Strengths: 2 nameservers configured (dns2.registrar-servers.com., dns1.registrar-servers.com.); 1 MX records present; Zone transfers properly restricted. Issues: DNSSEC not configured — DNS responses can be spoofed.
Similar companies
Other domains with comparable security profiles.
