CVE-2021-20330

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CVSS 3.1

6.5 medium

EPSS

1%p62

Published

Dec 15, 2021 (Dec 15, 2021)

Modified

Jun 17, 2026

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.

Vendors: mongodb
Products: mongodb
Weakness: CWE-20
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.0%)

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