CVE-2021-20332

Credential disclosure via connection pool creation events

Published Aug 2, 2021 · Updated Sep 17, 2024

Information disclosure in MongoDB Rust Driver 1.0.0 through 1.2.1, 2.0.0-alpha, and 2.0.0-alpha1 allows local users to obtain credentials. ConnectionPoolOptions is shared between pool internals and event monitoring, causing the pool-created event to expose authentication data that application logging can persist. Exposure requires an application-configured connection-pool event listener; monitoring is disabled by default, and the bounded impact is credential disclosure.

CVSS severity4.2
Medium
EPSS probability0.31%
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 MongoDB Rust Driver 1.0.0 through 1.2.1, 2.0.0-alpha, and 2.0.0-alpha1 allows local users to obtain credentials. ConnectionPoolOptions is shared between pool internals and event monitoring, causing the pool-created event to expose authentication data that application logging can persist. Exposure requires an application-configured connection-pool event listener; monitoring is disabled by default, and the bounded impact is credential disclosure.

The record

CVE
CVE-2021-20332
Published
Aug 2, 2021
Updated
Sep 17, 2024
Vendor
MongoDB
Product
MongoDB Rust Driver
Classifications
CWE-200, T1552
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 2, 2021CVE 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=1.00.0 <=1.2.1
  2. Affected versionversion=1.0.0 <=1.2.1
  3. Affected versionversion=2.0.0-alpha
  4. Affected versionversion=2.0.0-alpha1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

MongoDB · MongoDB Rust Driverversion=1.00.0 <=1.2.1; version=1.0.0 <=1.2.1; version=2.0.0-alpha; version=2.0.0-alpha1

Published CVSS scores

4.2MongoDB, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/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.

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

No observations available

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

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

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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