Modes Of Introduction
Architecture and Design
Implementation
Applicable Platforms
Language
Class: Not Language-Specific (Undetermined)
Operating Systems
Class: Not OS-Specific (Undetermined)
Architectures
Class: Not Architecture-Specific (Undetermined)
Technologies
Class: Client Server (Undetermined)
Class: Web Based (Undetermined)
Observed Examples
| References |
Description |
| Session was not invalidated after inactivity |
| Session not invalidated after security relevant account change |
Potential Mitigations
Phases : Implementation
Ensure that user sessions are invalidated on the server-side for all possible security related events relevant to the application. It is important that the server-side handles all session invalidation and does not rely on the client to remove or delete a session, due to the possibility of adversaries capturing session identifiers or cookies for later reuse.
Detection Methods
Dynamic Analysis with Manual Results Interpretation
Ensure that application testing includes scenarios that are intended to lead to session invalidation and verify that the session can no longer be used.
Vulnerability Mapping Notes
Justification : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Comment : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Notes
This entry was created in CWE 5.0 to address known gaps in CWE coverage. It is not as complete as other new entries that were published in recent years. The CWE Team plans to work with the CWE community to make this entry more complete in later 5.x releases.
References
REF-1520
Insufficient Session Expiration
WASC.
http://projects.webappsec.org/w/page/13246944/Insufficient%20Session%20Expiration REF-1565
Session invalidation
Non-Human Identity Management Group.
https://nhimg.org/glossary/session-invalidation/
Submission
| Name |
Organization |
Date |
Date release |
Version |
| CWE Content Team |
MITRE |
2026-10-23 +00:00 |
2026-10-28 +00:00 |
5.0 |