Backup & Unreferenced File Discovery

What is Backup & Unreferenced File Discovery?

Probes for common backup files (.bak, .old, .sql), editor artifacts (.swp, ~), and unreferenced pages.

This vulnerability class falls under the Configuration & Deployment Management phase of the OWASP Testing Guide (WSTG-CONF). Security engineers prioritise configuration & deployment management checks early in an assessment because weaknesses here provide a foothold that amplifies the severity of vulnerabilities found in later phases.

Security Impact

Backup files often contain source code or database credentials. This module finds forgotten files that attackers actively hunt.

Left undetected, backup & unreferenced file discovery issues can persist unnoticed for months. Continuous automated scanning ensures your team receives an alert the moment a regression or new exposure is introduced — long before an attacker discovers it through manual enumeration or automated offensive tooling.

How DygDog Detects It

DygDog audits server configuration, exposed file paths, HTTP methods, and deployment artefacts without sending malicious payloads, making the check safe to run continuously in production.

The Backup & Unreferenced File Discovery check is implemented as a passive scan module, meaning it never sends dangerous payloads or modifies application state. Scans complete in approximately 15.0 s and run continuously in the background so your security posture reflects the current state of your site — not a point-in-time snapshot.

Remediation Approach

Harden server and framework defaults by disabling unused HTTP methods, removing version banners from response headers, and applying a principle-of-least-privilege to file permissions and deployment artefacts.

DygDog does not stop at detection. When a Backup & Unreferenced File Discovery finding is confirmed, the platform generates infrastructure-aware, copy-paste-ready remediation snippets using frontier AI models. Instead of generic advice you need to adapt, you receive code that targets your exact server, framework, and configuration.

OWASP References

This check maps to the following OWASP Testing Guide test cases:

• WSTG-CONF-04View OWASP WSTG →

Related Configuration & Deployment Management Checks

These checks belong to the same testing phase and are often assessed together:

• TLS/SSL Configuration

  Validates HTTPS enforcement, certificate validity, protocol versions, and cipher suite strength.

• HTTP Methods Testing

  Tests for dangerous HTTP methods (TRACE, PUT, DELETE, OPTIONS) that may be unintentionally enabled.

• Security Headers Analysis

  Comprehensive check for HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.

• File Extension & MIME Handling

  Tests how the server handles various file extensions and MIME types, looking for bypass opportunities.