How severe is CVE-2017-17665?

CVE-2017-17665 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-2017-17665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-17665?

CVE-2017-17665 affects Octopus Octopus Deploy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-17665?

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-2017-17665 published?

CVE-2017-17665 was published on 2017-12-13 and last updated on 2026-06-17.

CVE-2017-17665

CVE-2017-17665 is a high-severity vulnerability in Octopus Octopus Deploy 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-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Octopus Octopus Deploy
Published: 2017-12-13
Last modified: 2026-06-17

Description

In Octopus Deploy before 4.1.3, the machine update process doesn't check that the user has access to all environments. This allows an access-control bypass because the set of environments to which a machine is scoped may include environments in which the user lacks access.

Frequently asked questions

What is CVE-2017-17665?: In Octopus Deploy before 4.1.3, the machine update process doesn't check that the user has access to all environments. This allows an access-control bypass because the set of environments to which a machine is scoped may include environments in which the user lacks access.
How severe is CVE-2017-17665?: CVE-2017-17665 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-2017-17665 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-17665?: CVE-2017-17665 affects Octopus Octopus Deploy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-17665?: 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-2017-17665 published?: CVE-2017-17665 was published on 2017-12-13 and last updated on 2026-06-17.

References

https://github.com/OctopusDeploy/Issues/issues/4073

Affected products (1)

cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:*

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