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CVE Record

CVE-2020-2790: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Pluggable Auth).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Pluggable Auth). Supported versions that are affected are 5.7.28 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 3.0 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.0/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

This vulnerability can let a low-privileged network user crash or hang affected MySQL Server instances. The main business risk is service outage, not data theft or data modification, based on the supplied CVSS vector.

Executive priority

Treat as a moderate availability risk. Prioritize systems supporting critical applications, externally reachable databases, and shared MySQL platforms where repeated crashes could disrupt business operations.

Technical view

CVE-2020-2790 affects Oracle MySQL Server 5.7.28 and prior in Server: Pluggable Auth. It is network-reachable, low-complexity, requires low privileges, and can cause complete denial of service. The supplied data reports no confidentiality or integrity impact.

Likely exposure

Exposure is most likely where MySQL Server 5.7.28 or earlier is reachable over a network by authenticated low-privilege users. Internet exposure or broad internal access increases operational risk.

Exploitation context

The source bundle does not identify active exploitation, and KEV is false. Public details provided here are limited to impact, affected versions, component, and CVSS characteristics.

Researcher notes

The affected component is Server: Pluggable Auth. CVSS is AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. No CWE, root cause detail, exploit method, or named fixed version is included in the supplied bundle.

Mitigation direction

  • Apply Oracle April 2020 CPU guidance or vendor-provided MySQL updates.
  • Upgrade affected MySQL Server 5.7.28 and prior installations per vendor guidance.
  • Restrict MySQL network access to trusted hosts and required applications.
  • Review low-privilege database accounts and remove unnecessary access.
  • Check appliance or distribution advisories from NetApp, Gentoo, or relevant vendors.

Validation and detection

  • Inventory MySQL Server versions and flag 5.7.28 or earlier.
  • Confirm whether MySQL is reachable from untrusted networks or broad internal segments.
  • Review authentication exposure for low-privilege database users.
  • Verify vendor patch status against Oracle CPU April 2020 guidance.
  • Check monitoring for repeated MySQL hangs, crashes, or unexpected restarts.
Prepared
Confidence
medium
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-2020-2790 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
6.5 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/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
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
6.5CVSS 3.0MediumCVSS:3.0/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 3.0 score

6.5Medium
CVSS 3.0 vector shape for CVE-2020-2790Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/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 Server5.7.28 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.