No exploitation reportedFix available

CVE-2023-20855

Q: Is CVE-2023-20855 actively exploited?

Active exploitation of CVE-2023-20855 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-20855?

CVE-2023-20855 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2023-02-22
Fixed in8.11.1
WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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 escalation of privileges.

Timeline

dates in UTC

2023-02-2200:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-20855?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-20855?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Vmware vrealize automation

Branch	Affected	Fixed in	Source
8.x	≥ 8.0, < 8.11.1	8.11.1	NVD

Vmware vrealize orchestrator

Branch	Affected	Fixed in	Source
8.x	≥ 8.0, < 8.11.1	8.11.1	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Vmware vrealize automation to 8.11.1

Advisories and patches

www.vmware.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-03-17
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.18.82025-03-12
NVDCVSS 3.18.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-6112025-03-12
NVDweakness (CWE)CWE-611read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2023-02-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-20855?

Is CVE-2023-20855 actively exploited?

Active exploitation of CVE-2023-20855 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-20855?

CVE-2023-20855 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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