CVE-2023-21893 — Oracle.ManagedDataAccess
HIGHCVE-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
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
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2023-21893 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
Oracle.ManagedDataAccess.NETOracle.ManagedDataAccess.Core.NETOracle.ManagedDataAccess.NETOracle.ManagedDataAccess.CoreReal-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
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Oracle.ManagedDataAccess | ≥ 21.0.0&&< 21.9.0 | 21.9.0dotnet add package Oracle.ManagedDataAccess --version 21.9.0 |
| .NETNuGet | Oracle.ManagedDataAccess.Core | ≥ 3.21.0&&< 3.21.90 | 3.21.90dotnet add package Oracle.ManagedDataAccess.Core --version 3.21.90 |
| .NETNuGet | Oracle.ManagedDataAccess | ≥ 19.0.0&&< 19.18.0 | 19.18.0dotnet add package Oracle.ManagedDataAccess --version 19.18.0 |
| .NETNuGet | Oracle.ManagedDataAccess.Core | ≥ 2.19.0&&< 2.19.180 | 2.19.180dotnet add package Oracle.ManagedDataAccess.Core --version 2.19.180 |
Detection & mitigation playbook
Open-source dependencyDetect
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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-21893 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2023-21893. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2023-21893 in your dependencies?
O3 Security finds CVE-2023-21893 across NuGet dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.