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% (64th 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% (64th 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% (64th 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:*:*:*:*:*:*:*:*

More vulnerabilities in Octopus Octopus Deploy

CVE-2020-10678 — High (CVSS 8.8): In Octopus Deploy before 2020.1.5, for customers running on-premises Active Directory linked to their Octopus server,…
CVE-2018-5706 — High (CVSS 8.8): An issue was discovered in Octopus Deploy before 4.1.9. Any user with user editing permissions can modify teams to give…
CVE-2018-4862 — High (CVSS 8.8): In Octopus Deploy versions 3.2.11 - 4.1.5 (fixed in 4.1.6), an authenticated user with ProcessEdit permission could…
CVE-2019-11632 — High (CVSS 8.1): In Octopus Deploy 2019.1.0 through 2019.3.1 and 2019.4.0 through 2019.4.5, an authenticated user with the…
CVE-2021-26556 — High (CVSS 7.8): When Octopus Server is installed using a custom folder location, folder ACLs are not set correctly and could lead to an…
CVE-2022-2013 — High (CVSS 7.5): In Octopus Server after version 2022.1.1495 and before 2022.1.2647 if private spaces were enabled via the experimental…

All CVEs affecting Octopus Octopus Deploy →

Other CWE-862 (Missing Authorization) vulnerabilities

CVE-2026-65667 — Critical (CVSS 10.0): Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-48168 — Critical (CVSS 10.0): PraisonAI is a multi-agent teams system. In versions prior to 4.6.40, the bundled Claude GitHub Actions workflow is…
CVE-2026-66012 — Critical (CVSS 10.0): SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated…
CVE-2026-58275 — Critical (CVSS 10.0): Missing authorization in Azure DNS allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-0092 — Critical (CVSS 10.0): In Package Manager, there is a possible device lock controller bypass due to a missing permission check. This could…
CVE-2026-33712 — Critical (CVSS 10.0): Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the preview chat endpoint (POST…

Browse all CWE-862 (Missing Authorization) vulnerabilities →