An issue was discovered in October through build 471. It reactivates an old session ID (which had been invalid after a logout) once a new login occurs. NOTE: this violates the intended Auth/Manager.php authentication behavior but, admittedly, is only relevant if an old session ID is known to an attacker.

An insufficient session expiration vulnerability [CWE- 613] in FortiClientEMS versions 6.4.2 and below, 6.2.8 and below may allow an attacker to reuse the unexpired admin user session IDs to gain admin privileges, should the attacker be able to obtain that session ID (via other, hypothetical attacks)

In BIG-IP Versions 17.0.x before 17.0.0.1, 16.1.x before 16.1.3.1, 15.1.x before 15.1.6.1, 14.1.x before 14.1.5.1, and all versions of 13.1.x, and BIG-IQ version 8.x before 8.2.0 and all versions of 7.x, an authenticated user's iControl REST token may remain valid for a limited time after logging out from the Configuration utility. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

In Ifme, versions 1.0.0 to v.7.33.2 don’t properly invalidate a user’s session even after the user initiated logout. It makes it possible for an attacker to reuse the admin cookies either via local/network access or by other hypothetical attacks.