CVE-2020-7921: MongoDB

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Improper serialization of internal state in the authorization subsystem in MongoDB Server's authorization subsystem permits a user with valid credentials to bypass IP whitelisting protection mechanisms following administrative action. This issue affects MongoDB Server v4.2 versions prior to 4.2.3; MongoDB Server v4.0 versions prior to 4.0.15; MongoDB Server v4.3 versions prior to 4.3.3and MongoDB Server v3.6 versions prior to 3.6.18.

Affected products

• MongoDB MongoDB: from 3.6.0, before 3.6.18 (fixed in 3.6.18); from 4.0.0, before 4.0.15 (fixed in 4.0.15); from 4.2.0, before 4.2.3 (fixed in 4.2.3); from 4.3.0, before 4.3.3 (fixed in 4.3.3)

Published 2020-05-06. Last modified 2026-06-17.