How severe is CVE-2020-9301?

CVE-2020-9301 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-9301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9301?

CVE-2020-9301 affects Linuxfoundation Spinnaker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9301?

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-2020-9301 published?

CVE-2020-9301 was published on 2020-12-11 and last updated on 2026-06-17.

CVE-2020-9301

CVE-2020-9301 is a high-severity vulnerability in Linuxfoundation Spinnaker 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-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Linuxfoundation Spinnaker
Published: 2020-12-11
Last modified: 2026-06-17

Description

Nolan Ray from Apple Information Security identified a security vulnerability in Spinnaker, all versions prior to version 1.23.4, 1.22.4 or 1.21.5. The vulnerability exists within the handling of SpEL expressions that allows an attacker to read and write arbitrary files within the orca container via authenticated HTTP POST requests.

Frequently asked questions

What is CVE-2020-9301?: Nolan Ray from Apple Information Security identified a security vulnerability in Spinnaker, all versions prior to version 1.23.4, 1.22.4 or 1.21.5. The vulnerability exists within the handling of SpEL expressions that allows an attacker to read and write arbitrary files within the orca container via authenticated HTTP POST requests.
How severe is CVE-2020-9301?: CVE-2020-9301 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-9301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9301?: CVE-2020-9301 affects Linuxfoundation Spinnaker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9301?: 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-2020-9301 published?: CVE-2020-9301 was published on 2020-12-11 and last updated on 2026-06-17.

References

https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2020-006.md

Affected products (1)

cpe:2.3:a:linuxfoundation:spinnaker:*:*:*:*:*:*:*:*

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