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CVE Record

CVE-2020-14771: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: LDAP Auth).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: LDAP Auth). Supported versions that are affected are 5.7.31 and prior and 8.0.21 and prior. Difficult to exploit 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 partial denial of service (partial DOS) of MySQL Server. CVSS 3.1 Base Score 2.2 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L).

LowCVSS 2.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a low-severity MySQL Server availability issue in LDAP authentication. An already high-privileged attacker with network access could cause a partial denial of service. The sources do not show data theft, data change, or active exploitation evidence.

Executive priority

Handle through routine patch and configuration management, not emergency response. Prioritize internet-exposed or broadly reachable database servers, but the documented impact is limited to partial service disruption.

Technical view

CVE-2020-14771 affects Oracle MySQL Server 5.7.31 and prior, and 8.0.21 and prior, in Server: Security: LDAP Auth. CVSS 3.1 is 2.2: network reachable, high complexity, high privileges required, no user interaction, low availability impact only.

Likely exposure

Exposure is most plausible where affected MySQL versions are reachable over a network and LDAP authentication is relevant. Risk is lower when MySQL access is tightly restricted and administrative privileges are controlled.

Exploitation context

The CVE record describes exploitation as difficult and requiring a high-privileged attacker with network access via multiple protocols. The bundle marks KEV as false and provides no cited evidence of active exploitation.

Researcher notes

No CWE is listed in the supplied bundle. The strongest source facts are affected versions, LDAP Auth component, high privilege requirement, high attack complexity, and low availability-only impact. Do not infer exploitability beyond those constraints.

Mitigation direction

  • Identify MySQL Server instances at 5.7.31 or prior and 8.0.21 or prior.
  • Review Oracle, NetApp, Gentoo, or distribution guidance for supported updates.
  • Restrict MySQL network exposure to trusted hosts and administrative networks.
  • Limit high-privilege MySQL accounts and review LDAP authentication use.
  • Schedule remediation according to normal database maintenance windows.

Validation and detection

  • Inventory MySQL Server versions across production and managed appliances.
  • Confirm whether LDAP authentication is enabled or deployed.
  • Verify network access paths to MySQL from untrusted or broad internal segments.
  • Review administrative account scope and recent authentication activity.
  • Check vendor advisory status for each packaged or appliance-provided MySQL instance.
Prepared
Confidence
high
Sources
5

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-2020-14771 mapping review

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Vulnerability profileCVE Program record
Severity
Low
CVSS
2.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

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
4Source 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
2.2CVSS 3.1LowCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L0.71.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

2.2Low
CVSS 3.1 vector shape for CVE-2020-14771Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

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 Server5.7.31 and prior, 8.0.21 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.