How severe is CVE-2021-20335?

CVE-2021-20335 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-20335 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20335?

CVE-2021-20335 affects Mongodb Ops Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20335?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20335 published?

CVE-2021-20335 was published on 2021-02-11 and last updated on 2026-06-17.

CVE-2021-20335

CVE-2021-20335 is a medium-severity vulnerability in Mongodb Ops Manager with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 4.1
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Mongodb Ops Manager
Published: 2021-02-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-20335?: 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.
How severe is CVE-2021-20335?: CVE-2021-20335 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-20335 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20335?: CVE-2021-20335 affects Mongodb Ops Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20335?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20335 published?: CVE-2021-20335 was published on 2021-02-11 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:mongodb:ops_manager:*:*:*:*:*:*:*:*

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