CVE-2023-21872Network attack vector

High-privilege data modification and service interruption

Published Jan 17, 2023 · Updated Sep 17, 2024

Unspecified optimizer flaw in Oracle MySQL Server 8.0.29 and earlier allows remote authenticated users to modify data or crash the service. Oracle has not disclosed the optimizer locus or the incorrect operation performed on attacker-controlled input. Exploitation requires a high-privilege account with network access through a supported protocol and can alter some accessible data or repeatedly crash the server.

CVSS severity5.5
Medium
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unspecified optimizer flaw in Oracle MySQL Server 8.0.29 and earlier allows remote authenticated users to modify data or crash the service. Oracle has not disclosed the optimizer locus or the incorrect operation performed on attacker-controlled input. Exploitation requires a high-privilege account with network access through a supported protocol and can alter some accessible data or repeatedly crash the server.

The record

CVE
CVE-2023-21872
Published
Jan 17, 2023
Updated
Sep 17, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=8.0.29 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.29 and prior

Published CVSS scores

5.5OracleCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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