Octopus Server
CVE-2025-0588
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization HTTP response header sanitization
|
| Impact | CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, high privileges required, no user interaction not required. EPSS exploitation probability: 0.38%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAIv1 – Mar 28, 2026
In affected versions of Octopus Server it was possible for a user with sufficient access to set custom headers in all server responses. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
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Technical ContextAI · show details
This vulnerability is classified under CWE-113. 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. Affected products include: Octopus Octopus Server.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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.
Executive ViewAI
Organizations using affected should be aware of moderate risk from CVE-2025-0588 rated CVSS 5.9. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
More in Octopus Server
View allIn Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with permission to modify deployment
In Octopus Deploy 2019.1.0 through 2019.3.1 and 2019.4.0 through 2019.4.5, an authenticated user with the VariableViewUn
Server-level configuration changes can be made by any authenticated low-privilege user in Octopus Server through a speci
In affected versions of Octopus Server where access is managed by an external authentication provider, it was possible t
In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. Rated critical
In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the target do not have sensitive va
Path traversal in Octopus Deploy allows removing files and file contents on the host through API manipulation. Enables d
In affected versions of Octopus Server it is possible for a session token to be valid indefinitely due to improper valid
Path traversal in Octopus Server allows an authenticated low-privilege user to overwrite arbitrary files on the server f
Authenticated remote code execution in Octopus Server allows any user whose role grants permission to edit an Environmen
Privilege escalation in Octopus Server lets an authenticated user who already holds permission to modify roles weaken a
Incorrect authorization in Octopus Server causes the platform to evaluate multiple scoped permission assignments incorre
GitHub PoC
Exploit-DB