How severe is CVE-2023-21893?

CVE-2023-21893 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-21893?

CVE-2023-21893 affects the following packages: Oracle.ManagedDataAccess (NuGet), Oracle.ManagedDataAccess.Core (NuGet), Oracle.ManagedDataAccess (NuGet), Oracle.ManagedDataAccess.Core (NuGet). Ecosystems affected: NuGet.

How do I fix CVE-2023-21893?

Update Oracle.ManagedDataAccess to 21.9.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-21893 is resolved across your whole dependency graph.

How do I detect CVE-2023-21893 in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Oracle.ManagedDataAccess, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-21893 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2023-21893 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-21893 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2023-21893?

CVE-2023-21893 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 49th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2023-21893?

CVE-2023-21893 is classified as CWE-284 (CWE-284). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2023-21893 published, and has it been updated?

CVE-2023-21893 was published on January 18, 2023 and was last updated on September 17, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET

.NET NuGet

Not in CISA KEV

HIGH severity

CVE-2023-21893 — Oracle.ManagedDataAccess

HIGH

CVE-2023-21893 is a high-severity (CVSS 7.5) CWE-284 vulnerability in Oracle.ManagedDataAccess. A fix is available for Oracle.ManagedDataAccess — see the affected versions and patch details below.

Component takeover in Oracle Data Provider for .NET

Published

Jan 18, 2023

Updated

Sep 17, 2024

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-21893.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

.NETOracle.ManagedDataAccess.NETOracle.ManagedDataAccess.Core.NETOracle.ManagedDataAccess.NETOracle.ManagedDataAccess.Core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

Vulnerability in the Oracle Data Provider for .NET component of Oracle Database Server. Supported versions that are affected are 19c and 21c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TCPS to compromise Oracle Data Provider for .NET. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Data Provider for .NET. Note: Applies also to Database client-only on Windows platform. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

See the readme.txt files inside the .nupkg packages for a reference to the fix.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Oracle.ManagedDataAccess`	≥ 21.0.0&&< 21.9.0	21.9.0`dotnet add package Oracle.ManagedDataAccess --version 21.9.0`
.NETNuGet	`Oracle.ManagedDataAccess.Core`	≥ 3.21.0&&< 3.21.90	3.21.90`dotnet add package Oracle.ManagedDataAccess.Core --version 3.21.90`
.NETNuGet	`Oracle.ManagedDataAccess`	≥ 19.0.0&&< 19.18.0	19.18.0`dotnet add package Oracle.ManagedDataAccess --version 19.18.0`
.NETNuGet	`Oracle.ManagedDataAccess.Core`	≥ 2.19.0&&< 2.19.180	2.19.180`dotnet add package Oracle.ManagedDataAccess.Core --version 2.19.180`

Affected Products

1 product · 2 configurations

Application

database serveroracle

2 versions

19c21c

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Oracle.ManagedDataAccess, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Oracle.ManagedDataAccess to 21.9.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-21893 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2023-21893 in your dependencies?

Find it across NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

7.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

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

CWE Classification

CWE-284CWE-284

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Jan 18, 2023

Last updated

Sep 17, 2024

Identifiers

CVE-2023-21893

References

Advisorynvd.nist.gov · CVE 2023 21893 Webnuget.org · 3.21.90 Webnuget.org · 21.9.0 Weboracle.com · cpujan2023

Related vulnerabilities

This CVE is high severity; 3 of 8 other CVEs with CWE-284 are rated as high or higher (top: high).

GHSA-7mr3-28h5-m5vxCVE-2026-16454GHSA-qx75-2p3r-pwm5CVE-2026-118662CVE-2026-27975CVE-2026-62197CVE-2026-112946CVE-2026-113662Browse all CWE-284

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedSep 17, 2024

CVE-2023-21893 — Oracle.ManagedDataAccess

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2023-21893 in your dependencies?