IBM QRadar Suite Software 1.10.12.0 through 1.11.2.0 and IBM Cloud Pak for Security 1.10.0.0 through 1.10.11.0 does not invalidate session after a logout which could allow a user to impersonate another user on the system.
According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”