CVE-2021-20330

Published: Dec 15, 2021Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: NVD

Description

An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.

Affected (3)

Products: Mongodb: Mongodb

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Mongodb Mongodb	From 4.0.0 to 4.0.25
Mongodb Mongodb	From 4.2.0 to 4.2.14
Mongodb Mongodb	From 4.4.0 to 4.4.6

Related CWEs

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (2)

https://jira.mongodb.org/browse/SERVER-36263

Source: cna@mongodb.com

Issue TrackingPatchVendor Advisory

https://jira.mongodb.org/browse/SERVER-36263

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatchVendor Advisory

Timeline

No history available yet.