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CVE Record

CVE-2021-2213: 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 8.0.22 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-2021-2213 is a denial-of-service issue in Oracle MySQL Server's optimizer. An attacker who already has high database privileges and network access could cause MySQL Server to hang or crash repeatedly. The business impact is service downtime, not data theft or tampering based on the supplied CVSS data.

Executive priority

Treat this as a moderate availability risk. Prioritize remediation for business-critical MySQL databases, externally reachable services, or environments with broad privileged account use. It is less urgent than unauthenticated remote code execution, but repeated database crashes can still disrupt operations.

Technical view

The issue affects Oracle MySQL Server 8.0.22 and prior, component Server: Optimizer. CVSS 3.1 is 4.9 with AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. The disclosed impact is complete denial of service through hangs or frequently repeatable crashes. No CWE is listed in the source bundle.

Likely exposure

Exposure is mainly MySQL Server instances at version 8.0.22 or earlier where high-privileged accounts can connect over network-accessible MySQL protocols. Internet exposure increases operational risk, but exploitation still requires high privileges according to the source bundle.

Exploitation context

The CVE is not listed as KEV in the supplied data, and the bundle provides no cited evidence of active exploitation. The high privilege requirement limits broad opportunistic abuse, but compromised DBA-level credentials or overprivileged applications could make downtime possible.

Researcher notes

The key constraint is PR:H: successful exploitation requires a high-privileged attacker with network access. The stated impact is availability only, with no confidentiality or integrity impact in the CVSS vector. Sources do not provide root-cause detail, exploit status, CWE, or safe reproduction guidance.

Mitigation direction

  • Apply Oracle's April 2021 CPU guidance or a later supported fixed MySQL release.
  • Move affected MySQL Server deployments off version 8.0.22 and prior.
  • Restrict network access to MySQL Server to trusted application and admin paths.
  • Reduce high-privileged MySQL accounts to the minimum required roles.
  • Check NetApp guidance if MySQL is present through NetApp-managed environments.

Validation and detection

  • Inventory all MySQL Server versions across production, staging, and development.
  • Confirm no reachable MySQL Server remains on 8.0.22 or earlier.
  • Review accounts with high privileges and remove unnecessary grants.
  • Verify database monitoring for unexplained hangs or repeated crashes.
  • Confirm remediation status against Oracle and applicable NetApp advisories.
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-2021-2213 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-2021-2213Attack 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 Server8.0.22 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.