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CVE Record

CVE-2021-2384: 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 8.0.25 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-2021-2384 is a MySQL Server availability flaw. A highly privileged attacker who can reach MySQL over the network could make the database hang or crash repeatedly. The business risk is service disruption, not data theft or tampering based on the provided sources.

Executive priority

Treat this as a moderate availability risk. Prioritize internet-reachable, business-critical, or shared MySQL servers first, especially where privileged database accounts are broadly available. It is less urgent than unauthenticated remote code execution, but outages could affect operations.

Technical view

The vulnerability affects Oracle MySQL Server 8.0.25 and prior, in the Server: Optimizer component. CVSS 3.1 is 4.9 with network attack vector, low complexity, high privileges required, no user interaction, and high availability impact only.

Likely exposure

Exposure is most likely where MySQL Server 8.0.25 or earlier remains deployed and reachable by users or services with high-privileged database access. Systems using downstream or bundled MySQL packages should check vendor advisories.

Exploitation context

The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires high privileges and network access via supported MySQL protocols. Successful abuse can cause a complete denial of service through hangs or repeatable crashes.

Researcher notes

Public details are limited in the provided sources. No CWE is listed. The affected component is Server: Optimizer, and the impact is availability-only. Avoid assuming confidentiality or integrity impact without additional vendor evidence.

Mitigation direction

  • Apply Oracle July 2021 CPU guidance or later vendor security updates.
  • Check NetApp and Fedora advisories if using their affected packages or products.
  • Restrict network access to MySQL from only trusted hosts and services.
  • Review and minimize high-privileged MySQL accounts.
  • Monitor MySQL availability and crash patterns until remediation is complete.

Validation and detection

  • Inventory MySQL Server instances and record exact versions.
  • Flag Oracle MySQL Server 8.0.25 and prior for remediation review.
  • Confirm whether downstream vendor packages include the relevant security fix.
  • Review database access paths for high-privileged network users.
  • Check logs and monitoring for unexplained MySQL hangs or repeated crashes.
Prepared
Confidence
medium
Sources
6

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-2021-2384 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
5Source 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-2021-2384Attack 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 Server8.0.25 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.