Description

An unauthenticated remote attacker in possession of a valid session identifier is able to continue using the session after it should have expired. This increases the risk associated with stolen, leaked, shared, or unattended sessions and may enable unauthorized continued access to the FDS web interface.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-20T09:16:47.450Z",
  "pubdate": "2026-08-20T09:16:47.450Z",
  "executiveSummary": "An improper session management vulnerability exists within the FDS web interface, characterized by the failure to correctly invalidate expired sessions. This security deficiency allows an unauthenticated remote attacker who has acquired a valid session identifier to maintain active communication and unauthorized access to the application long after the designated session expiration threshold has been reached.\nThe risk implications are significant, as the lifespan of stolen, leaked, shared, or otherwise unattended sessions is artificially prolonged, expanding the operational window for malicious actors to interact with the system.\nExploitation of this vulnerability requires the attacker to possess a valid session identifier, typically obtained via preceding actions such as network sniffing, session hijacking, or access to an unattended workstation.\nOnce in possession of the session token, the attacker requires no further authentication credentials to bypass the intended expiration constraints and continue issuing arbitrary requests to the affected FDS web interface.\nThe primary impact involves unauthorized continued access to sensitive application functionality and data, potentially leading to persistent unauthorized control, privilege abuse, or further compromise of the underlying infrastructure depending on the privileges associated with the retained session.",
  "technicalDetails": "The root cause of this vulnerability lies in inadequate session lifecycle management within the FDS web interface application logic. Specifically, the server-side session validation routines fail to enforce strict expiration checks upon receiving subsequent HTTP requests containing a previously issued session identifier, or the application fails to explicitly destroy and invalidate session state resources upon reaching the predetermined timeout limit.\nThe vulnerable component resides in the session handling and authentication subsystem of the FDS web interface.\nNetwork exposure is remote, as the interface is accessible over standard network protocols utilized by web applications.\nAuthentication requirements for the exploitation phase are technically unauthenticated in the context of credential submission, relying entirely on the presentation of a previously generated valid session identifier. Privilege requirements are limited to whatever permissions were granted to the original session token.\nThe step-by-step attack flow proceeds as follows: First, a legitimate user establishes a session with the FDS web interface, acquiring a valid session identifier. Second, the session reaches its intended expiration time according to policy or inactivity thresholds. Third, due to the flawed session validation mechanism, the server-side application fails to revoke the session token or reject requests referencing it. Fourth, an attacker intercepts or retains this valid session identifier. Fifth, the attacker transmits HTTP requests to the FDS web interface incorporating the expired yet still accepted session identifier. Sixth, the application processes the incoming requests and grants access as if the session were fully active.\nThe post-exploitation impact includes sustained unauthorized interaction with the FDS web interface, enabling threat actors to leverage existing session permissions to query data, modify configurations, or execute authorized actions within the scope of the compromised session context."
}