Website Security Checker

A website security checker evaluates the public-facing security posture of a URL. Unlike a full pentest, it does not try to exploit anything — it just measures what is visible and whether it matches best practice. Think of it as a health checkup for your website.

A good checker gives you three things: a headline grade that tells you where you stand at a glance, a findings list that explains exactly what is wrong, and a fix plan that tells you how to remediate. ScanMyVibe does all three in one scan.

Grades are weighted by severity and category. Critical findings (exposed .env, expired cert, TLS 1.0) drop you to F. High findings (missing HSTS, weak CSP) drop you two grades. Medium findings drop you one grade each. Low and info findings only cap your maximum at A−.

A grade is not a score — it is a clear signal. If you are at C or below, there is something urgent to fix. If you are at B, you have room to harden. A means you are in the top 5% of production sites on the public web.

• → A — strict CSP with nonces, HSTS preload, HttpOnly/Secure/SameSite cookies, modern TLS, no info disclosure, clean CORS.
• → B — solid configuration, one or two missing headers or a slightly weak CSP.
• → C — missing core protections. Work to do today.
• → D — multiple high-severity issues. Attackers will find this.
• → F — active exposure. Fix immediately.

Every scan runs 100+ rules across seven categories: transport security (TLS, HSTS, upgrade-insecure-requests), content security (CSP, SRI, mixed content), cookies, CORS, information disclosure, dependency CVEs, and DNS hygiene (SPF, DMARC, CAA).

For each finding we return: severity, category, OWASP mapping, a human-readable description, the exact header or response that triggered it, and an AI-ready fix prompt tuned to your framework.

A security checker is not a replacement for antivirus, a WAF, or a pentest. They solve different problems:

• → Security checker (ScanMyVibe) — audits public configuration. Finds what is exposed.
• → Website antivirus / malware scanner — scans server files for injected malware. Finds what is infected.
• → Web Application Firewall (WAF) — blocks malicious traffic in real time. Prevents exploitation.
• → Pentest — human experts actively trying to break in. Finds deep logic flaws.

You need all four in a mature security program — but for a solo developer or small team, a checker is the highest leverage starting point.

The highest-value place to run a security checker is immediately before every deploy to production. A 30-second scan on your staging URL tells you whether the new build introduced any regression. Add it to your CI via webhook and fail builds that introduce criticals.

The second-best place is monthly on every live property. Configurations drift — a CDN rule, a dependency upgrade, a framework change — and continuous scanning catches the regression before it becomes an incident.

Learn more in our complete guide to securing a website or start with our free website security scanner.

Across thousands of scans, we see the same top five issues:

1. No Content-Security-Policy. Fix with our CSP generator.
2. Missing HSTS. One line: Strict-Transport-Security: max-age=63072000; includeSubDomains; preload.
3. Cookies without Secure/HttpOnly/SameSite. Add all three flags to session cookies.
4. Leaked Server/X-Powered-By. Remove with a one-line middleware.
5. Overly permissive CORS. Never allow * origin with credentials.

Fix these and you will rise from a C to an A− in under an hour on almost any stack.