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CVE-2023-20891

21
FAUCET Score

CVE-2023-20891 is an information disclosure vulnerability in VMware Tanzu Application Service for VMs and Isolation Segment, where CF API admin credentials are logged in hex encoding within platform system audit logs. This medium-severity vulnerability (CVSS 6.5) allows a malicious non-admin user with audit log access to retrieve these credentials, potentially leading to the deployment of malicious applications. While a default deployment restricts non-admin access to these logs, the vulnerability has garnered some community discussion and media coverage, though there is currently no evidence of active exploitation or public exploit code.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.11.0, < 2.11.35CPE matchmatch criteria
cpe:2.3:a:vmware:isolation_segment:*:*:*:*:*:*:*:*
>= 2.13.0, < 2.13.20CPE matchmatch criteria
cpe:2.3:a:vmware:isolation_segment:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.0.13CPE matchmatch criteria
cpe:2.3:a:vmware:isolation_segment:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.4CPE matchmatch criteria
cpe:2.3:a:vmware:isolation_segment:*:*:*:*:*:*:*:*
>= 2.11.0, < 2.11.42CPE matchmatch criteria
cpe:2.3:a:vmware:tanzu_application_service_for_virtual_machines:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.64%
Probability of exploitation in next 30 days
EPSS Percentile
46.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0064 is in the 57th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

vmwarepatch availablevia nvd_reference
View patch

References

vmware.com / security/advisories/VMSA-2023-0016.html
PatchVendor Advisory