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CVE Record

CVE-2021-2300: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 8.0.23 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-2021-2300 is a denial-of-service flaw in Oracle MySQL Server. A highly privileged attacker who can reach MySQL over the network could cause the server to hang or repeatedly crash. The impact is availability, not data theft or data modification, based on the supplied sources.

Executive priority

Treat this as a moderate availability risk. It does not indicate data compromise, but disruption of a critical database can still affect revenue, operations, and customer-facing services. Prioritize internet-reachable or business-critical MySQL environments first.

Technical view

The vulnerability affects MySQL Server 8.0.23 and prior in the Server DML component. CVSS 3.1 is 4.9: network exploitable, low complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only.

Likely exposure

Exposure is most relevant for organizations running MySQL Server 8.0.23 or earlier where highly privileged database users can connect over network-accessible protocols. The supplied sources do not identify specific exposed NetApp products or managed service configurations.

Exploitation context

The CVE is not listed as CISA KEV in the supplied bundle, and no cited source states active exploitation. The privilege requirement materially reduces likelihood, but successful abuse could still disrupt business applications dependent on the affected MySQL instance.

Researcher notes

The supplied evidence supports affected version range, component, CVSS vector, and availability impact. It does not provide root-cause detail, proof-of-concept status, fixed version mapping, or product-specific NetApp exposure details.

Mitigation direction

  • Review Oracle April 2021 CPU guidance for the supported MySQL Server update path.
  • Upgrade affected MySQL Server 8.0.23 or earlier installations per vendor instructions.
  • Check third-party appliance or platform vendor advisories before changing embedded MySQL components.
  • Restrict MySQL network access to trusted hosts and required administrative users.
  • Review privileged database accounts and remove unnecessary access.

Validation and detection

  • Inventory MySQL Server instances and capture exact versions.
  • Flag any MySQL Server version 8.0.23 or earlier for remediation review.
  • Confirm installed updates align with Oracle April 2021 CPU or later vendor guidance.
  • Review database logs for unexplained hangs or repeatable mysqld crashes.
  • Verify high-privilege MySQL accounts are limited and monitored.
Prepared
Confidence
high
Sources
4

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2021-2300 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
3Source 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-2021-2300Attack 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 Server8.0.23 and priorListed
Weakness

CWE details

No CWE listed

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