What is CVE-2025-0526?

CVE-2025-0526 is a medium-severity vulnerability in Microsoft Windows, classified under Missing Authorization. CVSS score: 5.4/10. Published 2025-02-11.

How severe is CVE-2025-0526?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Microsoft Windows

CVE-2025-0526

In affected versions of Octopus Deploy it was possible to upload files to unexpected locations on the host using an API endpoint. The field lacked validation which could potentially result in ways to circumvent expected workflows.

Vulnerability class: Broken Access Control

EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Microsoft Windows
Octopus Octopus_server
Octopus Deploy Server — versions 2022.4.791, 2024.4.401

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security@octopus.com (Broken Link)
af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-0526?: CVE-2025-0526 is a medium-severity vulnerability in Microsoft Windows, classified under Missing Authorization. CVSS score: 5.4/10. Published 2025-02-11.
How severe is CVE-2025-0526?: Medium severity. CVSS v3 base score is 5.4 out of 10.