Cyber Resilience

CVE-2023-20855

High

Published: 22 February 2023

Published
22 February 2023
Modified
17 March 2025
KEV Added
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Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0093 76.5th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-20855 is a high-severity Improper Restriction of XML External Entity Reference (CWE-611) vulnerability in Vmware Vrealize Automation. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 23.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

VMware vRealize Orchestrator contains an XML External Entity (XXE) vulnerability. A malicious actor, with non-administrative access to vRealize Orchestrator, may be able to use specially crafted input to bypass XML parsing restrictions leading to access to sensitive information or possible…

more

escalation of privileges.

CWE(s)
CWE-611

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

vmware
vrealize automation
8.0 — 8.11.1
vmware
vrealize orchestrator
8.0 — 8.11.1

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-611

Penetration testing includes XML external entity payloads, detecting XXE vulnerabilities and enabling their mitigation.

SI-4 System Monitoring
addresses: CWE-611

Identifies XML external entity processing via monitoring of unusual file/network access or resource usage.

References