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CVE Record

CVE-2021-2293: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Stored Procedure).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Stored Procedure). 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-2021-2293 is a denial-of-service flaw in Oracle MySQL Server’s stored procedure component. A highly privileged user with network access could make MySQL hang or crash repeatedly. The stated impact is service interruption, not data theft or data modification.

Executive priority

Treat this as a moderate operational availability risk. It is not described as data compromise, but a privileged attacker could repeatedly disrupt a critical database service. Prioritize patching where MySQL supports customer-facing, revenue, authentication, or operational workflows.

Technical view

Oracle reports affected MySQL Server versions as 8.0.23 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 remote network reachability but high privileges required, with availability-only impact. No CWE or root-cause detail is provided in the bundle.

Likely exposure

Exposure is most likely in environments still running MySQL Server 8.0.23 or earlier, especially where privileged database accounts can connect over network-accessible protocols. Risk is reduced where MySQL is patched, tightly firewalled, and privileged accounts are limited and monitored.

Exploitation context

The source bundle does not cite active exploitation, and the CVE is not marked KEV. Exploitation requires a high-privileged attacker with network access to MySQL. Successful exploitation can cause a complete denial of service through hangs or repeatable crashes.

Researcher notes

Focus validation on version exposure, privileged account pathways, and network reachability. The public bundle identifies the component as Server: Stored Procedure but does not provide root cause, exploit details, or a specific CWE. Avoid assuming broader Oracle or third-party product impact beyond cited advisories.

Mitigation direction

  • Review Oracle April 2021 CPU guidance for the applicable MySQL update path.
  • Upgrade affected MySQL Server 8.0.23 or earlier systems according to vendor guidance.
  • Restrict network access to MySQL from trusted application and administration hosts only.
  • Review and minimize high-privilege MySQL accounts.
  • Check NetApp guidance if MySQL is embedded in affected NetApp products.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.23 or earlier.
  • Confirm Oracle CPU fixes or later vendor-approved builds are deployed.
  • Review firewall rules and security groups exposing MySQL services.
  • Audit privileged MySQL accounts and recent privileged login activity.
  • Validate monitoring detects MySQL hangs, crashes, and repeated restarts.
Prepared
Confidence
medium
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-2021-2293 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-2021-2293Attack 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.