CVE-2021-21991

high

Description

The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).

References

https://www.tenable.com/blog/cve-2021-22005-critical-file-upload-vulnerability-in-vmware-vcenter-server

https://www.vmware.com/security/advisories/VMSA-2021-0020.html

Details

Source: Mitre, NVD

Published: 2021-09-22

Updated: 2022-07-12

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High