CVE-2021-2471Network attack vector

Data disclosure and crashes via incorrect authorization

Published Oct 20, 2021 · Updated Sep 25, 2024

Incorrect authorization in Oracle MySQL Connector/J 8.0.26 and earlier allows remote authenticated users to read data or crash the connector. Oracle has not published the affected code locus or how Connector/J performs the authorization check incorrectly. Exploitation requires high privileges and network access over a supported protocol; successful attacks can expose all connector-accessible data or cause a hang or repeatable crash.

CVSS severity5.9
Medium
EPSS probability7.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Oracle MySQL Connector/J 8.0.26 and earlier allows remote authenticated users to read data or crash the connector. Oracle has not published the affected code locus or how Connector/J performs the authorization check incorrectly. Exploitation requires high privileges and network access over a supported protocol; successful attacks can expose all connector-accessible data or cause a hang or repeatable crash.

The record

CVE
CVE-2021-2471
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
MySQL Connectors
Classifications
CWE-863
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.26 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Connectorsversion=8.0.26 and prior

Published CVSS scores

5.9Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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