How severe is CVE-2020-9042?

CVE-2020-9042 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-9042 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9042?

CVE-2020-9042 affects Couchbase Couchbase Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9042?

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-2020-9042 published?

CVE-2020-9042 was published on 2020-06-08 and last updated on 2026-06-17.

CVE-2020-9042

CVE-2020-9042 is a high-severity vulnerability in Couchbase Couchbase Server with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Couchbase Couchbase Server
Published: 2020-06-08
Last modified: 2026-06-17

Description

In Couchbase Server 6.0, credentials cached by a browser can be used to perform a CSRF attack if an administrator has used their browser to check the results of a REST API request.

Frequently asked questions

What is CVE-2020-9042?: In Couchbase Server 6.0, credentials cached by a browser can be used to perform a CSRF attack if an administrator has used their browser to check the results of a REST API request.
How severe is CVE-2020-9042?: CVE-2020-9042 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-9042 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9042?: CVE-2020-9042 affects Couchbase Couchbase Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9042?: 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-2020-9042 published?: CVE-2020-9042 was published on 2020-06-08 and last updated on 2026-06-17.

References

https://www.couchbase.com/resources/security#SecurityAlerts

Affected products (1)

cpe:2.3:a:couchbase:couchbase_server:6.0.0:*:*:*:*:*:*:*

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