CVE-2022-48282Network attack vector

Privileged code execution via unrestricted discriminator types

Published Feb 21, 2023 · Updated Mar 11, 2025

Deserialization of untrusted data in MongoDB .NET/C# Driver 2.18.0 and earlier allows remote authenticated users to execute code. The ObjectSerializer trusts a BSON _t discriminator for System.Object members and instantiates the selected type without a safe-type allowlist. Exploitation requires Windows full .NET Framework, an Object-typed model member, and unrestricted write access to the target collection.

CVSS severity6.6
Medium
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in MongoDB .NET/C# Driver 2.18.0 and earlier allows remote authenticated users to execute code. The ObjectSerializer trusts a BSON _t discriminator for System.Object members and instantiates the selected type without a safe-type allowlist. Exploitation requires Windows full .NET Framework, an Object-typed model member, and unrestricted write access to the target collection.

The record

CVE
CVE-2022-48282
Published
Feb 21, 2023
Updated
Mar 11, 2025
Vendor
MongoDB
Product
MongoDB .NET/C# Driver
Classifications
CWE-502
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2025Record 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=0 <=v2.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoDB .NET/C# Driverversion=0 <=v2.18.0

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.6MongoDB, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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