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CVE Record

CVE-2021-2308: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Information Schema).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Information Schema). 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 read access to a subset of MySQL Server accessible data. CVSS 3.1 Base Score 2.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N).

LowCVSS 2.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2021-2308 is a low-severity Oracle MySQL Server issue affecting version 8.0.23 and earlier. A high-privileged user with network access could read some MySQL Server data they should not access. The business risk is mainly confidentiality exposure inside already-privileged database environments.

Executive priority

Treat as routine patch and access-control hygiene unless affected MySQL instances hold sensitive data or privileged database access is poorly controlled. It should not displace urgent unauthenticated or actively exploited vulnerabilities.

Technical view

The vulnerability is in MySQL Server's Server: Information Schema component. Oracle describes it as easily exploitable over multiple network protocols, but only by a high-privileged attacker. Successful exploitation can cause unauthorized read access to a subset of accessible MySQL Server data. CVSS 3.1 is 2.7: AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

Likely exposure

Exposure is most likely where Oracle MySQL Server 8.0.23 or earlier is still deployed and reachable by privileged database users over network protocols. Internet exposure matters less than administrative account control because exploitation requires high privileges.

Exploitation context

The provided sources do not report active exploitation, and this CVE is not marked in KEV. The vulnerability is easy to trigger after an attacker already has high database privileges, so it is more relevant to insider risk, compromised admin accounts, and weak database access governance.

Researcher notes

The public description is limited. It identifies the component, affected version range, privilege requirement, network attack vector, and confidentiality-only impact, but not root cause details or proof of exploit. Avoid assuming broader impact beyond Oracle MySQL Server 8.0.23 and prior.

Mitigation direction

  • Review Oracle's April 2021 Critical Patch Update guidance for MySQL Server.
  • Upgrade affected MySQL Server 8.0.23 or earlier deployments using vendor-supported updates.
  • Restrict network access to MySQL administrative interfaces and trusted application paths.
  • Reduce high-privilege MySQL accounts to documented operational need.
  • Check NetApp advisory guidance if MySQL is embedded in NetApp-managed environments.

Validation and detection

  • Inventory MySQL Server versions and identify any 8.0.23 or earlier instances.
  • Confirm whether Oracle April 2021 CPU or later MySQL fixes are applied.
  • Review privileged MySQL accounts and remove unnecessary administrative grants.
  • Validate that MySQL network access is limited to approved sources.
  • Check database audit logs for unusual privileged access to metadata or information schema data.
Prepared
Confidence
high
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-2021-2308 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
Low
CVSS
2.7 (3.1)
Known Exploited
No
Published

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

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
2.7CVSS 3.1LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N1.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

2.7Low
CVSS 3.1 vector shape for CVE-2021-2308Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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.