How severe is CVE-2017-20189?

CVE-2017-20189 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-2017-20189 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-20189?

CVE-2017-20189 affects Clojure. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-20189?

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.

Does CVE-2017-20189 have an EU (EUVD) identifier?

Yes. CVE-2017-20189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0379.

When was CVE-2017-20189 published?

CVE-2017-20189 was published on 2024-01-22 and last updated on 2026-06-17.

CVE-2017-20189

CVE-2017-20189 is a critical-severity vulnerability in Clojure with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0379
Weakness: CWE-502
Affected product: Clojure
Published: 2024-01-22
Last modified: 2026-06-17

Description

In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.

Frequently asked questions

What is CVE-2017-20189?: In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.
How severe is CVE-2017-20189?: CVE-2017-20189 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-2017-20189 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-20189?: CVE-2017-20189 affects Clojure. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-20189?: 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.
Does CVE-2017-20189 have an EU (EUVD) identifier?: Yes. CVE-2017-20189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0379.
When was CVE-2017-20189 published?: CVE-2017-20189 was published on 2024-01-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:clojure:clojure:*:*:*:*:*:*:*:*

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