CVE-2025-13281: K8s.io/kubernetes Kube-controller-manager Is Vulnerable To Half-blind Vulnerability
MODERATECVE-2025-13281 is a MODERATE (CVSS 5.8) kube-controller-manager is vulnerable to half-blind vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting K8s.io/kubernetes libraries in the Go ecosystem. The issue involves kube-controller-manager is vulnerable to half-blind server side request forgery through in-tree portworx storageclass. Remediation is available by upgrading affected packages to version 1.32.10, 1.33.6, 1.34.2.
CVE-2025-13281 at a Glance
Security Impact
CVSS: 5.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N).
How to Fix CVE-2025-13281
To remediate this vulnerability, upgrade all affected K8s.io/kubernetes dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade k8s.io/kubernetes to 1.32.10Upgrade k8s.io/kubernetes to 1.33.6Upgrade k8s.io/kubernetes to 1.34.2Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for k8s.io/kubernetesHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-13281, inspect your project dependencies for K8s.io/kubernetes:
inspect dependencies for k8s.io/kubernetesAnalyze the terminal output to locate any version of K8s.io/kubernetes in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.32.10), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In K8s.io/kubernetes, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-13281 Affected K8s.io/kubernetes Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
k8s.io/kubernetes
|
Go |
< 1.32.10
|
1.32.10
|
|
k8s.io/kubernetes
|
Go |
≥ 1.33.0-alpha.0
< 1.33.6
|
1.33.6
|
|
k8s.io/kubernetes
|
Go |
≥ 1.34.0-alpha.0
< 1.34.2
|
1.34.2
|
References
Frequently Asked Questions
What is CVE-2025-13281?
Which K8s.io/kubernetes versions are affected?
What version fixes CVE-2025-13281?
Is k8s.io/kubernetes affected?
What is the CVSS score of CVE-2025-13281?
What CWE is associated with CVE-2025-13281?
How can I check Go dependencies for CVE-2025-13281?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-r6j8-c6r2-37rr",
"modified" : "2025-12-20T03:27:50Z",
"published" : "2025-12-15T00:30:25Z",
"aliases" : [ "CVE-2025-13281" ],
"summary" : "kube-controller-manager is vulnerable to half-blind Server Side Request Forgery through in-tree Portworx StorageClass",
"details" : "A half-blind Server Side Request Forgery (SSRF) vulnerability exists in kube-controller-manager when using the in-tree Portworx StorageClass. This vulnerability allows authorized users to leak arbitrary information from unprotected endpoints in the control plane’s host network (including link-local or loopback services).",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "k8s.io/kubernetes"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.32.10"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "k8s.io/kubernetes"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.33.0-alpha.0"
}, {
"fixed" : "1.33.6"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "k8s.io/kubernetes"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.34.0-alpha.0"
}, {
"fixed" : "1.34.2"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-13281"
}, {
"type" : "WEB",
"url" : "https://github.com/kubernetes/kubernetes/issues/135525"
}, {
"type" : "WEB",
"url" : "https://github.com/kubernetes/kubernetes/commit/7506ce804c20696ba32cdb72126270ceaed06e24"
}, {
"type" : "WEB",
"url" : "https://github.com/kubernetes/kubernetes/commit/97650c1c4fe15cbb7756ba95b3edc8a8665063ca"
}, {
"type" : "WEB",
"url" : "https://github.com/kubernetes/kubernetes/commit/dbe17dfe7773563eac95534040f413ada6d2b421"
}, {
"type" : "ADVISORY",
"url" : "https://github.com/advisories/GHSA-r6j8-c6r2-37rr"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/kubernetes/kubernetes"
}, {
"type" : "WEB",
"url" : "https://groups.google.com/g/kubernetes-security-announce/c/EORqZg0k1l4/m/TtD-q0v7AgAJ"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2025/12/01/4"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-918" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-12-16T00:48:30Z",
"nvd_published_at" : "2025-12-14T22:15:36Z"
}
}