What’s Vulnerable › Vulnerabilities

CVE-2021-20335: SSL may be unexpectedly disabled during upgrade of multiple-server MongoDB Ops Manager

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-11 · updated 2026-06-17
• Weakness: CWE-319

Description

For MongoDB Ops Manager versions prior to and including 4.2.24 with multiple OM application servers, that have SSL turned on for their MongoDB processes, the upgrade to MongoDB Ops Manager versions prior to and including 4.4.12 triggers a bug where Automation thinks SSL is being turned off, and can disable SSL temporarily for members of the cluster. This issue is temporary and eventually corrects itself after MongoDB Ops Manager instances have finished upgrading to MongoDB Ops Manager 4.4. In addition, customers must be running with clientCertificateMode=OPTIONAL / allowConnectionsWithoutCertificates=true to be impacted*.* Customers upgrading from Ops Manager 4.2.X to 4.2.24 and finally to Ops Manager 4.4.13+ are unaffected by this issue.

Affected products

• MongoDB Inc. MongoDB Ops Manager: from 4.2.0 through 4.2.24

References

• https://docs.opsmanager.mongodb.com/v4.2/release-notes/application/#onprem-server-4-2-23
• https://docs.opsmanager.mongodb.com/v4.2/release-notes/application/#onprem-server-4-2-23

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