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#2 A02:2025

Security Misconfiguration

The application might be vulnerable if it is missing appropriate security hardening or has improperly configured permissions on cloud services.

Overview

Rose from #5 to #2 in 2025, with every tested application showing some form of misconfiguration. The increased complexity of modern cloud environments and configurable software has elevated this risk category significantly.

How Attackers Exploit This

Understanding attack patterns helps you build better defenses. These are the techniques security teams watch for.

Default credentials

Administrative interfaces or services are left with default usernames and passwords that are publicly known.

Detection signal: Login attempts using common default credential pairs

Verbose error messages

Detailed error messages expose internal paths, stack traces, or database schemas to attackers.

Detection signal: Error responses containing internal file paths, SQL queries, or stack traces

Cloud storage exposure

Cloud storage buckets or containers are publicly accessible due to misconfigured access policies.

Detection signal: Public enumeration of storage resources, anonymous access to sensitive files

How to Prevent

  • Implement a repeatable hardening process for fast, secure deployment
  • Remove or do not install unused features and frameworks
  • Review and update configurations appropriate to all security notes
  • Use segmented application architecture for effective separation
  • Send security directives to clients (Security Headers)
  • Automate verification of configurations in all environments
  • Use infrastructure as code with security scanning

CWEs with Shoulder Detection (6)

These CWEs have Shoulder detection rules. Click to see specific vulnerabilities and fixes.

Other Mapped CWEs (14)

These CWEs are mapped to this category. Use MITRE references for guidance.