Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, SessionRequestHandler in the session management endpoint does not enforce ownership or privilege checks when a low-privileged authenticated user queries session information in deployments using stateful session storage. A requester who knows a target identity identifier can retrieve another user's active session credentials, including credentials for a more privileged account, and use them to hijack that session. This issue is fixed in version 16.1.1.
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-vvhj-w2jq-263q
https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1
https://github.com/OpenIdentityPlatform/OpenAM/commit/f775b42236b3cb94e3a02a19f4a4f4f5cc0b91c4