CVE-2023-20891: VMware Isolation Segment

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

The VMware Tanzu Application Service for VMs and Isolation Segment contain an information disclosure vulnerability due to the logging of credentials in hex encoding in platform system audit logs. A malicious non-admin user who has access to the platform system audit logs can access hex encoded CF API admin credentials and can push new malicious versions of an application. In a default deployment non-admin users do not have access to the platform system audit logs.

Affected products

• VMware Isolation Segment: from 2.11.0, before 2.11.35 (fixed in 2.11.35); from 2.13.0, before 2.13.20 (fixed in 2.13.20); from 3.0.0, before 3.0.13 (fixed in 3.0.13); from 4.0.0, before 4.0.4 (fixed in 4.0.4)
• VMware Tanzu Application Service For Virtual Machines: from 2.11.0, before 2.11.42 (fixed in 2.11.42); from 2.13.0, before 2.13.24 (fixed in 2.13.24); from 3.0.0, before 3.0.14 (fixed in 3.0.14); from 4.0.0, before 4.0.5 (fixed in 4.0.5)

Published 2023-07-26. Last modified 2026-06-17.