How severe is CVE-2020-36939?

CVE-2020-36939 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 high, integrity none, and availability none.

Is CVE-2020-36939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2020-36939?

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.

Does CVE-2020-36939 have an EU (EUVD) identifier?

Yes. CVE-2020-36939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30857.

When was CVE-2020-36939 published?

CVE-2020-36939 was published on 2026-01-27 and last updated on 2026-06-17.

CVE-2020-36939

CVE-2020-36939 is a high-severity vulnerability 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-30857
Weakness: CWE-22
Published: 2026-01-27
Last modified: 2026-06-17

Description

Cassandra Web 0.5.0 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating path traversal parameters. Attackers can exploit the disabled Rack::Protection module to read sensitive system files like /etc/passwd and retrieve Apache Cassandra database credentials.

Frequently asked questions

What is CVE-2020-36939?: Cassandra Web 0.5.0 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating path traversal parameters. Attackers can exploit the disabled Rack::Protection module to read sensitive system files like /etc/passwd and retrieve Apache Cassandra database credentials.
How severe is CVE-2020-36939?: CVE-2020-36939 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 high, integrity none, and availability none.
Is CVE-2020-36939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2020-36939?: 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.
Does CVE-2020-36939 have an EU (EUVD) identifier?: Yes. CVE-2020-36939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30857.
When was CVE-2020-36939 published?: CVE-2020-36939 was published on 2026-01-27 and last updated on 2026-06-17.

References

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