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CVE Record

CVE-2023-22056: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.33 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-22056 is a MySQL Server denial-of-service issue. A highly privileged user with network access can cause the server to hang or repeatedly crash. It does not indicate data theft or data modification, but it can interrupt systems that depend on affected MySQL databases.

Executive priority

Schedule remediation through the normal database patch cycle, with faster action for critical databases or environments with shared privileged credentials. This is not presented as a data breach vulnerability, but a repeatable database outage can still create business disruption.

Technical view

Oracle describes the flaw in MySQL Server's Server: Optimizer component. Supported affected versions are MySQL Server 8.0.33 and prior. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H, meaning network reachable, low complexity, high privileges required, and availability-only impact.

Likely exposure

Exposure is most relevant for organizations running MySQL Server 8.0.33 or earlier, especially where privileged database accounts can connect over a network. Internet exposure increases operational risk, but the source data says exploitation requires high privileges.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. Oracle rates the issue easily exploitable, but only by a high-privileged attacker with network access through multiple protocols. Treat it primarily as a resilience and privileged-access risk.

Researcher notes

No CWE is listed in the provided bundle. The key constraints are high privileges and availability-only impact. Do not assume exploit availability or active exploitation from these sources. Confirm fixed package levels through Oracle or the relevant downstream advisory before closing remediation.

Mitigation direction

  • Apply Oracle's July 2023 Critical Patch Update guidance for MySQL Server.
  • Use downstream vendor updates where MySQL is supplied by Fedora, NetApp, or another platform vendor.
  • Restrict MySQL network access to required application hosts and administration networks.
  • Review and reduce high-privileged MySQL accounts where practical.
  • Prioritize remediation for business-critical databases with broad network reachability.

Validation and detection

  • Inventory MySQL Server versions and identify instances at 8.0.33 or earlier.
  • Confirm whether vendor packages include fixes from the July 2023 Oracle CPU.
  • Review database privileges for accounts allowed to connect remotely.
  • Check monitoring for unexplained MySQL hangs, restarts, or repeat crashes.
  • Validate network controls limiting direct access to MySQL services.
Prepared
Confidence
high
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2023-22056 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2023-22056Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationMySQL Server*Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.