CVE-2025-0588: In affected versions of Octopus Server it was possible for a user with sufficient access to set custom headers in all server responses. By...
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.
Classification
CVE ID: CVE-2025-0588
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.9
CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected Products
Vendor: Octopus Deploy
Product: Octopus Server
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 11.94% (scored less or equal to compared to others)
EPSS Date: 2025-03-12 (when was this score calculated)