The Interior Server and Gateway Server components of TIBCO Software Inc.'s TIBCO PartnerExpress contain an easily exploitable vulnerability that allows an unauthenticated attacker with network access to obtain session tokens for the affected system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO PartnerExpress: versions 6.2.1 and below.