OWASP_API_TOP10API9:2023voice-validated
OWASP_API_TOP10 API09: API9:2023
OWASP_API_TOP10
AL
Founder at SQUR · last verified 2026-06-20
Regulation text
APIs tend to expose more endpoints than traditional web applications, making proper and updated documentation highly important. A proper inventory of hosts and deployed API versions also are important to mitigate issues such as deprecated API versions and exposed debug endpoints.
ATT&CK techniques this article tests · 0
| Technique | Why it maps | Confidence |
|---|
Defending mitigations · 7
| Mitigation | What it does | Confidence |
|---|---|---|
| M1035 | 1. Restricting access to API endpoints, especially deprecated or debug ones, prevents unauthorized use and discovery. | 90% |
| M1038 | 1. Regularly reviewing and managing accounts, including those for API access, reduces the risk of exploiting undocumented APIs. | 80% |
| M1047 | 1. Comprehensive logging and auditing of API access and changes detect and respond to exploitation of undocumented endpoints. | 90% |
| M1050 | 1. Regular vulnerability scanning identifies exposed or deprecated API versions and debug endpoints, closing potential attack vectors. | 90% |
| M1051 | 1. Managing risks from third-party APIs ensures their documentation and inventory are properly maintained, reducing exposure. | 70% |
| M1031 | 1. Isolating internal or debug APIs from external networks prevents their discovery and exploitation by unauthorized actors. | 80% |
| M1036 | 1. Implementing strong policies for API key and service account usage reduces the risk of credentials being used against undocumented APIs. | 80% |
Underlying weaknesses · 7
| CWE | Why it persists | Confidence |
|---|---|---|
| CWE-200 | 1. Undocumented APIs or debug endpoints often expose sensitive data without proper authorization checks, leading to information exposure. | 90% |
| CWE-209 | 1. Debug endpoints frequently return verbose error messages that can reveal internal system details to attackers. | 80% |
| CWE-215 | 1. Exposed debug endpoints provide attackers with valuable system and application insights, aiding in further exploitation. | 90% |
| CWE-306 | 1. Undocumented administrative or critical API functions may lack proper authentication, allowing unauthorized access. | 80% |
| CWE-489 | 1. Leaving debug code enabled in production environments, especially in undocumented APIs, creates exploitable vulnerabilities. | 90% |
| CWE-668 | 1. Internal or debug API resources are inadvertently exposed to external networks due to improper inventory management. | 80% |
| CWE-749 | 1. Undocumented APIs can contain dangerous methods or functions that, when discovered, can be exploited by attackers. | 90% |
What SQUR Covers
Web application + API pentesting for OWASP Top 10, business logic flaws, authentication bypass, injection attacks, and other application-layer vulnerabilities. €1,995 per scan, 24-hour turnaround, EU-only data.
What SQUR Does Not Cover
Internal network pentesting, endpoint security testing, physical security assessments, social engineering, or ICT third-party concentration risk reviews. Engage a complementary provider for those scope items.
Provenance
Mapped Q2.2026 using gemini-2.5-flash · €0.0166 compute · voice-rubric self-validated