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CVE Record

CVE-2021-2298: 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 8.0.23 and prior. Easily exploitable vulnerability allows low 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2298 is a denial-of-service issue in Oracle MySQL Server. A low-privileged user who can reach MySQL over the network could cause the database service to hang or crash repeatedly. The primary business risk is outage of applications that depend on affected MySQL versions.

Executive priority

Treat this as a practical availability risk, not a data-theft issue based on available sources. Patch affected production databases in normal vulnerability-management cycles, faster where downtime would materially affect operations or customers.

Technical view

Oracle identifies the vulnerable component as MySQL Server: Optimizer. Supported affected versions are MySQL Server 8.0.23 and prior. CVSS 3.1 is 6.5: network reachable, low complexity, low privileges, no user interaction, and high availability impact with no stated confidentiality or integrity impact.

Likely exposure

Exposure is most likely where MySQL Server 8.0.23 or earlier is reachable by authenticated low-privileged users over network protocols. Risk increases for production databases supporting customer-facing applications or shared environments with many database accounts.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Oracle describes the issue as easily exploitable by a low-privileged attacker with network access. Public sources provided do not include exploit details, proof-of-concept status, or observed attacks.

Researcher notes

No CWE is listed in the supplied data. The available detail is limited to Oracle's component, version range, CVSS vector, and denial-of-service impact. Do not infer affected forks, embedded products, exploitability beyond authenticated network access, or specific crash mechanics from these sources.

Mitigation direction

  • Apply Oracle's April 2021 Critical Patch Update or later supported MySQL updates.
  • Prioritize internet-facing and production MySQL Server 8.0.23 or earlier instances.
  • Restrict MySQL network access to trusted application hosts and administration networks.
  • Review Oracle and relevant vendor advisories for environment-specific remediation guidance.
  • Check NetApp guidance if NetApp products depend on affected MySQL components.

Validation and detection

  • Inventory MySQL Server instances and record exact versions.
  • Confirm whether any deployment runs MySQL Server 8.0.23 or earlier.
  • Map which database accounts can connect over network protocols.
  • Verify patched systems no longer report an affected MySQL version.
  • Review database monitoring for hangs, repeated crashes, and availability alerts.
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

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CVE-2021-2298 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
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2021-2298Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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.