CVE-2023-21880Network attack vector

Authenticated database modification and server denial of service

Published Jan 17, 2023 · Updated Sep 17, 2024

An undisclosed flaw in Oracle MySQL Server 8.0.31 and earlier allows remote authenticated users to modify data or crash the server. Oracle has not published the vulnerable InnoDB code path or the operation it performs incorrectly on attacker-controlled input. Exploitation requires high-privilege MySQL credentials and network access over the MySQL protocol; successful attacks can update, insert, or delete some accessible data, hang the service, or cause repeatable crashes.

CVSS severity5.5
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An undisclosed flaw in Oracle MySQL Server 8.0.31 and earlier allows remote authenticated users to modify data or crash the server. Oracle has not published the vulnerable InnoDB code path or the operation it performs incorrectly on attacker-controlled input. Exploitation requires high-privilege MySQL credentials and network access over the MySQL protocol; successful attacks can update, insert, or delete some accessible data, hang the service, or cause repeatable crashes.

The record

CVE
CVE-2023-21880
Published
Jan 17, 2023
Updated
Sep 17, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1499, T1565
Attack vector
network
Privileges
authenticated

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=8.0.31 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.31 and prior

Published CVSS scores

5.5NISTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
5.5Oracle CorporationCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

T1499Endpoint Denial of Service
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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