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CVE Record

CVE-2021-2012: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Privileges).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Privileges). Supported versions that are affected are 8.0.20 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-2021-2012 is a denial-of-service vulnerability in Oracle MySQL Server. An already high-privileged attacker who can reach MySQL over the network may cause the server to hang or crash repeatedly. The business risk is database outage, not data theft, based on the provided CVSS impacts.

Executive priority

Treat as a scheduled but important database availability fix. Escalate priority for critical production databases, externally reachable MySQL services, or environments with many privileged database users.

Technical view

The issue affects Oracle MySQL Server 8.0.20 and prior, component Server: Security: Privileges. 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 mainly MySQL Server deployments at version 8.0.20 or earlier where high-privileged database users can connect over network protocols. Systems using downstream vendor packages should verify advisory applicability with their distribution or appliance vendor.

Exploitation context

The source bundle marks this CVE as not in KEV and provides no cited evidence of active exploitation. Oracle describes it as easily exploitable, but only by a high-privileged attacker with network access.

Researcher notes

The public bundle does not include root-cause details, exploit mechanics, or a named fixed MySQL version. Analysis should stay constrained to availability impact, high-privilege precondition, and vendor advisory verification.

Mitigation direction

  • Apply Oracle January 2021 CPU guidance or later vendor-approved MySQL updates.
  • For Fedora, Gentoo, or NetApp contexts, follow the linked vendor advisories.
  • Limit MySQL network reachability to trusted hosts and application tiers.
  • Review and reduce high-privileged MySQL accounts with remote access.
  • Use monitoring and failover controls for MySQL crash or hang detection.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.20 or prior.
  • Confirm whether Oracle, Fedora, Gentoo, or NetApp advisories apply.
  • Review privileged MySQL accounts permitted to connect over the network.
  • Check database availability logs for unexplained repeated hangs or crashes.
  • Document remediation status and any vendor exception decisions.
Prepared
Confidence
high
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-2021-2012 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
6Source 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-2021-2012Attack 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 Server8.0.20 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.