How severe is CVE-2019-20925?

CVE-2019-20925 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-20925 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20925?

CVE-2019-20925 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20925?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-20925 published?

CVE-2019-20925 was published on 2020-11-24 and last updated on 2026-06-17.

CVE-2019-20925

CVE-2019-20925 is a high-severity vulnerability in Mongodb with a CVSS 3.x base score of 7.5. 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-697.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-697
Affected product: Mongodb
Published: 2020-11-24
Last modified: 2026-06-17

Description

An unauthenticated client can trigger denial of service by issuing specially crafted wire protocol messages, which cause the message decompressor to incorrectly allocate memory. This issue affects MongoDB Server v4.2 versions prior to 4.2.1; MongoDB Server v4.0 versions prior to 4.0.13; MongoDB Server v3.6 versions prior to 3.6.15 and MongoDB Server v3.4 versions prior to 3.4.24.

Frequently asked questions

What is CVE-2019-20925?: An unauthenticated client can trigger denial of service by issuing specially crafted wire protocol messages, which cause the message decompressor to incorrectly allocate memory. This issue affects MongoDB Server v4.2 versions prior to 4.2.1; MongoDB Server v4.0 versions prior to 4.0.13; MongoDB Server v3.6 versions prior to 3.6.15 and MongoDB Server v3.4 versions prior to 3.4.24.
How severe is CVE-2019-20925?: CVE-2019-20925 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-20925 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20925?: CVE-2019-20925 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20925?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-20925 published?: CVE-2019-20925 was published on 2020-11-24 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-43751

Affected products (1)

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

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Threat intelligence

Threat-intel indicators referencing this CVE:

160.202.253.14 (ipv4-addr)
203.154.34.104 (ipv4-addr)
91.208.207.34 (ipv4-addr)
49.233.137.179 (ipv4-addr)
139.199.80.137 (ipv4-addr)
210.222.46.15 (ipv4-addr)