CVE-2023-21827Network attack vector

Authenticated disclosure of redacted database data

Published Jan 17, 2023 · Updated Sep 17, 2024

Information disclosure in Oracle Database Data Redaction 19c and 21c allows remote authenticated users to read protected data via Oracle Net. Oracle has not published the vulnerable code path or the operation that incorrectly exposes a subset of data protected by redaction policies. Exploitation requires a valid database account with Create Session privilege; the reported consequence is limited to unauthorized reading of accessible redacted data.

CVSS severity4.3
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Oracle Database Data Redaction 19c and 21c allows remote authenticated users to read protected data via Oracle Net. Oracle has not published the vulnerable code path or the operation that incorrectly exposes a subset of data protected by redaction policies. Exploitation requires a valid database account with Create Session privilege; the reported consequence is limited to unauthorized reading of accessible redacted data.

The record

CVE
CVE-2023-21827
Published
Jan 17, 2023
Updated
Sep 17, 2024
Vendor
Oracle Corporation
Product
Oracle Database
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=19c
  2. Affected versionversion=21c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · Oracle Databaseversion=19c; version=21c

Published CVSS scores

4.3OracleCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

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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