Vulnerability in the Siebel CRM product of Oracle Siebel CRM (component: Siebel Core - Server Infrastructure). Supported versions that are affected are 21.5 and Prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Siebel CRM. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).