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CVE Record

CVE-2020-14765: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: FTS).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: FTS). Supported versions that are affected are 5.6.49 and prior, 5.7.31 and prior and 8.0.21 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-2020-14765 is a denial-of-service flaw in Oracle MySQL Server. A low-privileged network user can cause the database to hang or repeatedly crash. It does not indicate data theft or data modification, but it can interrupt business services that depend on affected MySQL versions.

Executive priority

Treat this as a moderate availability risk. Prioritize systems supporting customer-facing services, revenue operations, or shared database platforms, especially where low-privileged users can connect remotely.

Technical view

The flaw affects MySQL Server FTS in versions 5.6.49 and prior, 5.7.31 and prior, and 8.0.21 and prior. CVSS 3.1 is 6.5 with network attack vector, low complexity, low privileges required, no user interaction, and high availability impact only.

Likely exposure

Exposure is most relevant where affected MySQL Server instances are reachable by low-privileged database users over the network. Internet-facing databases, shared database platforms, and environments with many application or tenant accounts have higher practical risk.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation evidence. The CVE description says exploitation is easy once an attacker has low privileges and network access, with the expected result limited to database availability loss.

Researcher notes

The source bundle identifies the component as Server: FTS but does not provide root-cause details, proof-of-concept status, CWE mapping, or exploit telemetry. Avoid assuming confidentiality or integrity impact beyond the stated availability failure mode.

Mitigation direction

  • Apply Oracle October 2020 CPU guidance or later vendor-supported MySQL updates.
  • Upgrade beyond MySQL 5.6.49, 5.7.31, and 8.0.21 where applicable.
  • Review downstream vendor advisories for packaged MySQL or related database builds.
  • Restrict MySQL network access to trusted application hosts and administrative networks.
  • Remove unnecessary low-privileged database accounts and rotate stale credentials.

Validation and detection

  • Inventory MySQL Server versions and compare them with the affected version ranges.
  • Confirm vendor patch level from Oracle or the relevant Linux distribution advisory.
  • Check whether MySQL is reachable from untrusted networks or broad internal segments.
  • Review database accounts for low-privileged users with network login capability.
  • Monitor MySQL availability logs for unexplained hangs or repeated crash patterns.
Prepared
Confidence
high
Sources
12

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-2020-14765 mapping review

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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
11Source 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-2020-14765Attack 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 Server5.6.49 and prior, 5.7.31 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.