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OWASP Top 10 for SaaS: What Enterprise Buyers Actually Check

A practical guide to the OWASP Top 10 vulnerabilities that enterprise security teams scrutinize during vendor assessments — and how to address them.

SaaSFort Team 5 min read

When an enterprise procurement team asks for “OWASP compliance evidence,” most B2B SaaS CTOs know what OWASP is — but few know which of the Top 10 categories enterprise security teams actually scrutinize closely.

This guide breaks down the OWASP Top 10 from the procurement perspective: not just what each vulnerability means technically, but what enterprise InfoSec teams look for in vendor assessments.

The OWASP Top 10 (2021) — Enterprise Procurement Lens

A01: Broken Access Control

What it is: Users can access resources or perform actions they shouldn’t be authorized for.

What enterprise buyers check:

  • Can one customer’s data be accessed by another customer? (Multi-tenancy isolation)
  • Can a standard user escalate to admin privileges?
  • Are API endpoints protected with proper authorization checks?

Procurement red flag: Any evidence of IDOR (Insecure Direct Object Reference) vulnerabilities — these are catastrophic for enterprise buyers because they imply data leakage between tenant organizations.

How to demonstrate compliance: Automated scans should verify authorization checks on all authenticated endpoints. Include specific mention of multi-tenancy isolation testing in your report.

A02: Cryptographic Failures

What it is: Sensitive data exposed due to weak or missing encryption.

What enterprise buyers check:

  • Is data encrypted in transit (TLS 1.2+, no deprecated ciphers)?
  • Is sensitive data encrypted at rest?
  • Are API keys and secrets handled securely (not logged, not in URLs)?

Procurement red flag: TLS grade below A (check via SSL Labs), HTTP endpoints that redirect to HTTPS rather than enforcing HTTPS directly.

How to demonstrate compliance: SSL/TLS scan results with grade + cipher suite list. Explicit statement that no sensitive data is logged.

A03: Injection

What it is: SQL injection, command injection, LDAP injection — attacker-controlled input executed as code.

What enterprise buyers check:

  • Are all user inputs sanitized and parameterized?
  • Is the application resistant to SQL injection on login and search endpoints?

Procurement red flag: Any finding of SQL injection — even low-severity. Enterprise buyers treat this as a fundamental failure of secure development practice.

How to demonstrate compliance: Dynamic scan results showing injection testing performed on all input fields with zero findings.

A04: Insecure Design

What it is: Missing or ineffective security controls at the design level — not just implementation bugs.

What enterprise buyers check:

  • Are there rate limits on authentication endpoints?
  • Is there protection against brute-force attacks?
  • Are password reset flows resistant to account enumeration?

Procurement red flag: No rate limiting on login endpoints is increasingly flagged by enterprise CISOs.

A05: Security Misconfiguration

What it is: Incorrectly configured permissions, unnecessary features enabled, default credentials.

What enterprise buyers check:

  • Are security headers present? (Content-Security-Policy, X-Frame-Options, HSTS, X-Content-Type-Options)
  • Is directory listing disabled?
  • Are debug endpoints, admin panels, or staging environments publicly accessible?

Procurement red flag: Missing HSTS header or low CSP score. Easily caught by automated scanners and easily fixed — having these issues in a formal scan looks bad.

How to demonstrate compliance: Header scan results showing all security headers configured. This is one of the easiest wins.

A06: Vulnerable and Outdated Components

What it is: Using libraries or frameworks with known CVEs.

What enterprise buyers check:

  • How do you track CVEs in your dependencies?
  • What is your process for applying security patches?
  • How quickly do you patch critical CVEs?

Procurement red flag: A dependency with a known critical CVE (CVSS 9+) that’s been public for >30 days without a patch. This is increasingly common in enterprise questionnaires.

How to demonstrate compliance: CVE tracking report showing current dependency versions, known CVE status, and patch timeline history.

A07: Identification and Authentication Failures

What it is: Weak authentication mechanisms — no MFA, weak password policies, insecure session management.

What enterprise buyers check:

  • Does your application support SSO / SAML / OIDC? (Critical for larger enterprise)
  • Is MFA available for admin accounts?
  • What are your session timeout policies?

Procurement red flag for enterprise deals: No SSO support is a deal-blocker for many enterprise security policies. Make sure your roadmap addresses this.

A08: Software and Data Integrity Failures

What it is: Insecure deserialization, untrusted CI/CD pipeline inputs, software supply chain attacks.

What enterprise buyers check (post-SolarWinds, post-Log4Shell):

  • Do you have supply chain security practices?
  • Is your CI/CD pipeline protected?
  • Do you verify the integrity of third-party packages?

A09: Security Logging and Monitoring Failures

What it is: Not detecting, escalating, or responding to security breaches.

What enterprise buyers check:

  • Do you log authentication events (success and failure)?
  • Do you have alerting on suspicious activity?
  • What is your MTTD (Mean Time to Detect)?

Procurement red flag: No documented incident detection or response process.

A10: Server-Side Request Forgery (SSRF)

What it is: Application fetching remote resources based on user-supplied input, potentially accessing internal services.

What enterprise buyers check: Relevant for SaaS products that integrate with customer-specified URLs (webhooks, integrations) — a common attack vector for internal network access.

Building Your OWASP Evidence Package

For a procurement-ready OWASP evidence package, you need:

  1. Scan report — dated within 6 months, covering all 10 categories
  2. Finding list — with severity, CVSS score, and current status (open/remediated)
  3. Remediation timeline — showing how quickly you address findings by severity
  4. Attestation — brief statement from CTO confirming the scope of testing

The key: findings aren’t a problem. Every application has some. What enterprise buyers want to see is that you know about them and have a process to address them.

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