Description

CWE-287: Improper Authentication

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "10.0",
  "pubDate": "2026-08-13T10:17:15.017Z",
  "pubdate": "2026-08-13T10:17:15.017Z",
  "executiveSummary": "This vulnerability is categorized as CWE-287: Improper Authentication, representing a critical security flaw where an actor is able to claim a specific identity without proving that claim to the system's satisfaction. The primary impact of this vulnerability includes unauthorized access to sensitive resources, potential data exfiltration, privilege escalation, and full system compromise depending on the context of the affected application or product. This architectural weakness affects systems relying on cryptographic verification, session management, or credential validation that fails to correctly enforce identity verification protocols. The risk implications are severe, as successful exploitation undermines the fundamental security boundaries of the target environment, allowing malicious actors to impersonate legitimate users or system components. Attackers require network accessibility to the vulnerable authentication interface and must craft payloads or utilize logic flaws to bypass verification checks. Depending on the specific implementation failure, exploitation may be achieved remotely without prior authentication or valid credentials, presenting a significant threat to organizational data confidentiality, integrity, and availability.",
  "technicalDetails": "The root cause of CWE-287 stems from flawed architectural logic or incomplete implementation within the authentication mechanism, wherein the application fails to adequately verify the identity of a user, service, or system before granting access. The vulnerable component typically resides within the session handling, credential parsing, or token verification routines of the affected application. Attack flow begins when an unauthenticated attacker interacts with the exposed network service, targeting the weak authentication endpoint or protocol. Exploitation occurs step-by-step: first, the attacker submits manipulated input, fabricated cryptographic tokens, blank credentials, or leverages bypass techniques such as parameter tampering, direct object reference without validation, or flawed state machine transitions. Because the underlying verification logic fails to validate the authenticity of the provided claims against a secure source of truth, the application incorrectly assumes a state of authenticated access. The payload behavior involves establishing an unauthorized session or executing privileged functions under a falsified security context. Privilege requirements for the attacker may be non-existent, enabling zero-privilege actors to execute actions reserved for administrators or specific service accounts. Network exposure is typically high, as authentication interfaces are frequently exposed externally to facilitate remote user access. Post-exploitation impact includes lateral movement, arbitrary code execution, unauthorized data modification, and persistence within the compromised environment."
}