How severe is CVE-2020-24391?

CVE-2020-24391 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-24391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 75% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24391?

CVE-2020-24391 affects Mongo-express Project Mongo-express. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-24391?

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

When was CVE-2020-24391 published?

CVE-2020-24391 was published on 2021-03-30 and last updated on 2026-06-17.

CVE-2020-24391

CVE-2020-24391 is a critical-severity vulnerability in Mongo-express Project Mongo-express with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 75% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 75% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mongo-express Project Mongo-express
Published: 2021-03-30
Last modified: 2026-06-17

Description

mongo-express before 1.0.0 offers support for certain advanced syntax but implements this in an unsafe way. NOTE: this may overlap CVE-2019-10769.

Frequently asked questions

What is CVE-2020-24391?: mongo-express before 1.0.0 offers support for certain advanced syntax but implements this in an unsafe way. NOTE: this may overlap CVE-2019-10769.
How severe is CVE-2020-24391?: CVE-2020-24391 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-24391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 75% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24391?: CVE-2020-24391 affects Mongo-express Project Mongo-express. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-24391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-24391 published?: CVE-2020-24391 was published on 2021-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mongo-express_project:mongo-express:*:*:*:*:*:node.js:*:*

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