CVE-2023-21860

Cluster takeover through undisclosed internal access control flaw

Published Jan 18, 2023 · Updated Sep 16, 2024

Improper access control in Oracle MySQL Cluster allows high-privileged adjacent attackers to take over an affected cluster. Oracle has not disclosed the internal operation or access-control check that mishandles attacker-controlled input. Exploitation requires access to the cluster's physical communication segment, high privileges, difficult conditions, and interaction by another person; success grants full control of cluster data and service.

CVSS severity6.3
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Oracle MySQL Cluster allows high-privileged adjacent attackers to take over an affected cluster. Oracle has not disclosed the internal operation or access-control check that mishandles attacker-controlled input. Exploitation requires access to the cluster's physical communication segment, high privileges, difficult conditions, and interaction by another person; success grants full control of cluster data and service.

The record

CVE
CVE-2023-21860
Published
Jan 18, 2023
Updated
Sep 16, 2024
Vendor
Oracle Corporation
Product
MySQL Cluster
Classifications
CWE-284
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Jan 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.4.38 and prior
  2. Affected versionversion=7.5.28 and prior
  3. Affected versionversion=7.6.24 and prior
  4. Affected versionversion=8.0.31 and prior

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Clusterversion=7.4.38 and prior; version=7.5.28 and prior; version=7.6.24 and prior; version=8.0.31 and prior

Published CVSS scores

6.3OracleCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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