Overview
Findings
Actions
Details
Related
AI-Generated Summary
What this means
onesignal.com scored 85/100, demonstrating a strong security posture. Minor improvements are noted below.
Critical gaps in: Security Headers. Positive signals: DNS Configuration, TLS Configuration, Known Breaches all passed.
2 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 onesignal.com compares
Grade distribution across 2378 companies we've scanned. onesignal.com scores better than 78% of them.
71
A+
22
A
180
A-
181
B+
69
B
333
B-
111
C+
111
C
295
C-
110
D+
92
D
216
D-
587
F
onesignal.com — Grade B (85/100)
2378 companies scanned
Security checks
Each check inspects a different part of onesignal.com's public security setup. Green means healthy, yellow needs attention, red is a problem.
Security Headers
Only 2/5 security headers present. Missing: CSP, X-Content-Type-Options, Permissions-Policy. This exposes the application to clickjacking, MIME-sniffing, and other client-side attacks.
HSTS Header
HSTS present but max-age is low (15552000s). Recommended minimum: 15768000 (6 months).
DNS Configuration
Strengths: 2 nameservers configured (vin.ns.cloudflare.com., gail.ns.cloudflare.com.); 5 MX records present; DNSSEC enabled; Zone transfers properly restricted.
TLS Configuration
TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
Known Breaches
No known breaches found in public disclosure databases.
DMARC / Email Security
Strengths: DMARC policy set to reject (strongest); SPF record present with soft-fail (~all); DKIM configured (selectors: google, s1, s2).
CVE Exposure
Detected technologies: cloudflare, Proxy/CDN, SEOmatic. (cloudflare, 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, 87 days remaining; Issued by Google Trust Services.
Recommended actions
2 items
Steps to improve onesignal.com's security grade, ranked by impact.
1
Add missing security headers (CSP, X-Content-Type-Options, Permissions-Policy)
3 of 5 recommended security headers are missing on onesignal.com: CSP, X-Content-Type-Options, 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.
Compliance impact
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 Content-Security-Policy header (start with report-only to avoid breakage)
2
Add: X-Content-Type-Options: nosniff
3
Add: Permissions-Policy: camera=(), microphone=(), geolocation=()
4
Verify with: curl -sI https://onesignal.com | grep -iE 'content-security|x-frame|x-content|referrer|permissions'
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2
Increase HSTS max-age duration
HSTS is enabled but the max-age (0s) is below the recommended minimum of 15768000s (6 months). A short max-age means browsers forget the HTTPS-only policy quickly, reducing protection between visits.
Compliance impact
PCI-DSS 4.0Req 6.4.1
Application security header configuration
How to fix this
1
Update header: Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
2
Verify: curl -sI https://onesignal.com | grep -i strict
At a glance
Key data points from the scan.
TLS Version
TLSv1.3
TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.
DMARC Policy
p=reject
Strengths: DMARC policy set to reject (strongest); SPF record present with soft-fail (~all); DKIM configured (selectors: google, s1, s2).
SPF Record
Present
v=spf1 include:_spf.google.com include:_spf.salesforce.com include:mktomail.com include:_spf.senderg
Security Headers
2/5 present
Missing: CSP, X-Content-Type-Options, Permissions-Policy
HSTS
Not enabled
HSTS present but max-age is low (15552000s). Recommended minimum: 15768000 (6 months).
SSL Certificate
Valid
Strengths: Certificate valid, 87 days remaining; Issued by Google Trust Services.
DNSSEC
Enabled
Strengths: 2 nameservers configured (vin.ns.cloudflare.com., gail.ns.cloudflare.com.); 5 MX records present; DNSSEC enabled; Zone transfers properly restricted.