CVE-2020-7921Network attack vector

Authenticated IP restriction bypass via omitted role state

Published May 6, 2020 · Updated Nov 18, 2024

Incorrect authorization in MongoDB Server allows remote authenticated users to bypass configured per-user IP restrictions. RoleGraph::getBSONForRole omits authenticationRestrictions when serializing role state to BSON during a role update, causing the restrictions to be discarded. This requires valid credentials and an administrator updating the restricted role, after which the account connects from disallowed source addresses.

CVSS severity4.6
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in MongoDB Server allows remote authenticated users to bypass configured per-user IP restrictions. RoleGraph::getBSONForRole omits authenticationRestrictions when serializing role state to BSON during a role update, causing the restrictions to be discarded. This requires valid credentials and an administrator updating the restricted role, after which the account connects from disallowed source addresses.

The record

CVE
CVE-2020-7921
Published
May 6, 2020
Updated
Nov 18, 2024
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-182, CWE-863, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 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=3.6 <3.6.18
  2. Affected versionversion=4.0 <4.0.15
  3. Affected versionversion=4.2 <4.2.3
  4. Affected versionversion=4.3 <4.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoDB Serverversion=3.6 <3.6.18; version=4.0 <4.0.15; version=4.2 <4.2.3; version=4.3 <4.3.3

Published CVSS scores

4.6UbuntuCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/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 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-182Collapse of Data into Unsafe Value
CWE-863Incorrect Authorization
T1078Valid Accounts

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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