CVE-2025-0588

Description

In affected versions of Octopus Server it was possible for a user with sufficient access to set custom headers in all server responses. By submitting a specifically crafted referrer header the user could ensure that all subsequent server responses would return 500 errors rendering the site mostly unusable. The user would be able to subsequently set and unset the referrer header to control the denial of service state with a valid CSRF token whilst new CSRF tokens could not be generated.

Category

5.9
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory octopus.com
Affected: Octopus Deploy Octopus Server
Published at:
Updated at:

References

Link Tags
https://advisories.octopus.com/post/2024/sa2025-05/ broken link
https://advisories.octopus.com/post/2025/sa2025-05/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-0588?
CVE-2025-0588 has been scored as a medium severity vulnerability.
How to fix CVE-2025-0588?
To fix CVE-2025-0588, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-0588 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-0588 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-0588?
CVE-2025-0588 affects Octopus Deploy Octopus Server.
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