Improper Session Management in SAP Business Objects, 4.0, from 4.10, from 4.20, 4.30, CMC/BI Launchpad/Fiorified BI Launchpad. In case of password change for a user, all other active sessions created using older password continues to be active.
https://launchpad.support.sap.com/#/notes/2537150
https://blogs.sap.com/2018/04/10/sap-security-patch-day-april-2018/