Free Vulnerability Scanner
Free tool
Scans for vulnerable JS libraries (matched to CVE IDs), weak TLS, missing security headers, and insecure cookies. Severity-ranked findings with step-by-step fixes.
- Security misconfiguration detection
- Vulnerable library detection
- Configuration vulnerability scanning
- Security posture assessment
- Risk severity scoring
- Remediation guidance
No credit card requiredProduction-safe (100% passive)No setup or code required
Trusted by 3,500+ security & engineering teams
What you get for free
18 core security checks via this tool, passive scans, step-by-step remediation, security score on every result.
What Essential adds at $39/mo
+17 advanced checks, continuous monitoring, daily security score history, email alerts, GitHub SAST, board-ready PDFs, SOC 2 / ISO 27001 / PCI reports.
Why vulnerability scanning matters
Regular vulnerability scanning helps you identify and fix security issues before attackers exploit them. This tool provides:
- Early detection: Find vulnerabilities before they're exploited in production
- Risk prioritization: Focus on critical vulnerabilities first with severity scoring
- Compliance support: Meet security scanning requirements for PCI DSS, HIPAA, SOC 2
- Continuous monitoring: Track vulnerabilities over time and detect new issues
- Remediation guidance: Get actionable steps to fix each vulnerability
Combine automated vulnerability scanning with manual security testing for comprehensive coverage. Use this tool for regular security assessments and continuous vulnerability monitoring.
What to do with vulnerability scan results
After scanning for vulnerabilities, prioritize remediation based on risk severity:
- Critical security issues: Address immediately (missing security headers, weak TLS configuration, exposed sensitive information)
- High-risk issues: Fix within 7 days (insecure cookies, vulnerable libraries, security misconfigurations)
- Medium-risk issues: Plan remediation within 30 days (misconfigurations, weak encryption)
- Low-risk findings: Address during regular maintenance cycles
Document all fixes, verify remediation with rescanning, and establish a regular scanning schedule. For complex vulnerabilities or compliance requirements, consider engaging security professionals for validation and deeper analysis.
What this vulnerability scanner detects
Vulnerable Libraries & Dependencies:
- Vulnerable JavaScript libraries detection
- Outdated library version identification
- Known security issues in frontend dependencies
- Library security posture assessment
Security Misconfigurations:
- Insecure default configurations
- Missing or weak security headers
- Improper TLS/SSL configuration
- Insecure cookie settings
- Exposed sensitive information in headers
Configuration Vulnerabilities:
- Security header misconfigurations
- Cookie security issues
- Insecure security configurations
- Missing security controls
- Weak encryption settings
Infrastructure Vulnerabilities:
- TLS/SSL configuration weaknesses
- DNS security misconfigurations
- Email security vulnerabilities
- Network exposure and open ports
- Subdomain takeover risks
How Barrion verifies this
Barrion combines multiple passive signals to build a composite vulnerability picture without ever touching your application as an attacker would. The scanner fingerprints every JavaScript library it sees on the page, extracts version strings from bundle hashes and global objects, and cross-references them against the public CVE feed and the GitHub Advisory Database so a flagged finding is always backed by an upstream CVE ID, severity, and patched version.
For configuration vulnerabilities, Barrion replays the full TLS handshake, parses every response header, and inspects cookie attributes the same way a browser would, then compares the result against the OWASP Secure Headers Project, Mozilla's TLS guidelines, and the relevant RFCs. Each finding is tagged with the exact bytes that triggered it so you can reproduce the check yourself with curl or openssl.
Findings are then deduplicated, mapped to CWE categories, and ranked by exploitability so you see a stable, ordered list rather than a wall of raw output. Every finding ships with the source signal, the affected URL, and a concrete remediation step, which is what makes the report safe to hand directly to an engineering team or attach to a compliance ticket.
Tool-specific questions
What does a vulnerability scanner check?
A vulnerability scanner tests your web app for common security misconfigurations, outdated or vulnerable JavaScript libraries (with known CVEs), and configuration issues that create exploitable risk. Barrion's scanner is passive - no agent or code access needed. Results include severity scoring and step-by-step remediation so you know what to fix first.
What's the difference between a vulnerability scanner and a penetration test?
A vulnerability scanner uses passive analysis to identify security misconfigurations and configuration vulnerabilities. A penetration test involves manual testing by security experts with active vulnerability exploitation to find complex vulnerabilities, business logic flaws, and advanced attack scenarios. Use passive vulnerability scanning for regular monitoring and configuration review; use penetration testing for comprehensive security assessments.
How accurate are vulnerability scanner results?
Passive vulnerability scanners are highly accurate for detecting security misconfigurations, vulnerable libraries, and configuration issues. However, they cannot detect active vulnerabilities, business logic flaws, or advanced attack scenarios that require active testing. Always validate findings and supplement with manual penetration testing for comprehensive security assurance.
How often should I run vulnerability scans?
Run vulnerability scans after any major changes, deployments, or security updates. For ongoing monitoring, weekly scans are recommended. Use Barrion's continuous monitoring for automated daily scans and instant alerts when new vulnerabilities are detected. This ensures you catch new issues quickly and maintain security posture.
Can this scanner detect zero-day vulnerabilities?
No, our vulnerability scanner focuses on configuration vulnerabilities and security misconfigurations that can be detected through passive analysis. Zero-day vulnerabilities are unknown flaws that haven't been publicly disclosed. For zero-day protection, combine vulnerability scanning with intrusion detection, security monitoring, and professional security assessments.
What types of vulnerabilities can this scanner find?
Our vulnerability scanner detects vulnerable libraries, security misconfigurations, infrastructure weaknesses (TLS issues, DNS problems), security header problems, cookie security issues, and exposed sensitive information. It focuses on configuration vulnerabilities and security posture issues that can be detected through passive analysis.
Is vulnerability scanning safe for production environments?
Yes, our vulnerability scanner uses passive scanning techniques that are safe for production environments. We analyze publicly available information and use read-only methods. We never attempt to exploit vulnerabilities or perform actions that could harm your website or infrastructure.
Can I use this for compliance requirements?
Yes, vulnerability scanning is often required for compliance frameworks like PCI DSS, HIPAA, SOC 2, and ISO 27001. Our scanner provides evidence of security controls and can identify gaps in your security posture. Supplement with internal assessments and professional testing for complete compliance coverage.
What should I do if critical vulnerabilities are found?
If critical security issues are detected, prioritize immediate remediation. Apply configuration fixes, verify the remediation, and document the incident. For complex issues or if you're unsure about the fix, consider engaging security professionals for guidance. Critical configuration issues like missing security headers or weak TLS settings should be addressed within 24-48 hours.
How does this compare to other vulnerability scanners?
Our vulnerability scanner is free, non-intrusive, and provides instant results with actionable remediation guidance. It focuses on configuration vulnerabilities and security misconfigurations through passive analysis. For enterprise needs, consider combining our tool with commercial scanners and professional security assessments for comprehensive coverage.
Does the scanner work with APIs and web services?
Yes, our vulnerability scanner works with web applications, APIs, and web services. It analyzes security headers, CORS policies, TLS configuration, and other publicly accessible security configurations. For comprehensive API security testing, combine passive scanning with manual API security testing.
Why Barrion
Built for the engineers who already have enough to fix.
Speed
Real-time results
Instant analysis with a detailed report. You see findings as the scan runs, not after.
Coverage
Comprehensive checks
35+ checks per scan covering TLS, headers, CORS, cookies, DNS, email auth, and more, in a single pass.
Action
Step-by-step fixes
Every finding ships with the exact remediation step for your framework. Hand it to the engineer who owns the surface.
Other tools
More free checks, for the rest of your surface.
Complete Security Scan
Complete website security analysis with comprehensive vulnerability detection
Pre-Pentest Security Scan
Passive scan that catches the misconfigurations a pentester finds first. Use it before a manual engagement to clear the easy issues.
Security Compliance Checker
Check compliance with PCI DSS, HIPAA, SOC 2, ISO 27001, and GDPR. Get compliance readiness reports.
WAF Checker
Detect Web Application Firewall presence through passive header analysis. Identify WAF/CDN providers.
Security Headers Test
Check your website's HTTP security headers configuration
TLS/SSL Security Checker
Validate your SSL/TLS configuration and certificate setup
FAQ
Frequently asked.
What is Barrion and how does it enhance website security?
Barrion is a security testing and monitoring platform for engineering teams, covering three products: passive DAST that continuously watches your live web apps and APIs, SAST via GitHub that scans your codebase for secrets, insecure patterns and vulnerable dependencies, and AI pentesting that runs active, agent-driven attacks with proof-of-exploit. Findings come with step-by-step fixes you can ship immediately.
How safe is Barrion to use for security testing?
Every default Barrion scan is 100% passive and read-only. We never submit forms, brute-force endpoints or interact with state-changing routes, so it's safe to run against production.
What types of security issues does Barrion identify?
Barrion is a security testing and monitoring platform, so coverage spans three surfaces. Passive DAST flags misconfigurations across TLS/HTTPS, security headers, cookie flags, CORS policy, DNS records, email authentication (SPF/DKIM/DMARC), network exposure and common web hygiene issues. SAST via GitHub finds secrets in code, insecure patterns and vulnerable dependencies. AI pentesting adds exploitable findings like SQL injection, XSS and broken access control with proof-of-exploit.
What specific security checks does Barrion perform?
Barrion checks TLS/HTTPS configuration, HTTP security headers, cookie flags, CORS policy, DNS and email authentication records, network exposure and common web hygiene issues, then prioritises them by severity with clear remediation.
What is Barrion's smart crawling?
Smart crawling automatically discovers the pages and endpoints of your app so scans cover the surface that matters, without you manually listing every URL.
How often does Barrion perform security scans?
Manual scans on demand. Continuous monitoring runs automatically on Essential (weekly+) and Business (daily), and alerts you the moment a new issue appears.
Is Barrion suitable for security testing of all business sizes?
Yes. Barrion is a security testing and monitoring platform, with passive DAST, SAST via GitHub and AI pentesting available to solo developers, startups, scale-ups and enterprise security teams alike, without adding headcount.
How does Barrion handle data security and privacy during security testing?
Scans are passive and read-only by default, and we never store or expose sensitive data from your application. Pentests are rate-limited and non-destructive, designed to confirm exploitability without altering data or affecting availability.
What if I'm not satisfied with Barrion's security testing service?
Paid plans start with a free trial, and you can cancel anytime. If something isn't right, contact us and we'll make it work for your team.
How does Barrion help with SOC 2, ISO 27001, NIS2, and other compliance frameworks?
Barrion produces audit-ready PDF and CSV reports suitable for SOC 2, ISO 27001, PCI DSS and NIS2, ready to share with auditors, customers and your board.
Anything else? Email contact@barrion.io.
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