- NONE ([#124327](https://github.com/kubernetes/kubernetes/pull/124327), [@ritazh](https://github.com/ritazh)) [SIG Auth]
- OpenAPI V2 will no longer publish aggregated apiserver OpenAPI for group-versions not matching the APIService specified group version ([#123624](https://github.com/kubernetes/kubernetes/pull/123624), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

  - [Changelog since v1.25.0](#changelog-since-v1250)
  - [Important Security Information](#important-security-information-4)
    - [CVE-2022-3172: Aggregated API server can cause clients to be redirected (SSRF)](#cve-2022-3172-aggregated-api-server-can-cause-clients-to-be-redirected-ssrf)
  - [Changes by Kind](#changes-by-kind-14)
    - [API Change](#api-change-3)
    - [Feature](#feature-13)

- NONE ([#124326](https://github.com/kubernetes/kubernetes/pull/124326), [@ritazh](https://github.com/ritazh)) [SIG Auth]
- OpenAPI V2 will no longer publish aggregated apiserver OpenAPI for group-versions not matching the APIService specified group version ([#123625](https://github.com/kubernetes/kubernetes/pull/123625), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

Work this cycle focused on graduating existing functions, and on making security functions more understandable for users.

  - [Changelog since v1.24.4](#changelog-since-v1244)
  - [Important Security Information](#important-security-information-3)
    - [CVE-2022-3172: Aggregated API server can cause clients to be redirected (SSRF)](#cve-2022-3172-aggregated-api-server-can-cause-clients-to-be-redirected-ssrf)

* Resolves an issue serving aggregated APIs backed by services that respond to requests to `/` with non-2xx HTTP responses ([#79895](https://github.com/kubernetes/kubernetes/pull/79895), [@deads2k](https://github.com/deads2k))

- K8s docker config json secrets are now compatible with docker config desktop authentication credentials files ([#82148](https://github.com/kubernetes/kubernetes/pull/82148), [@bbourbie](https://github.com/bbourbie))
- Kubelet and aggregated API servers now use v1 TokenReview and SubjectAccessReview endpoints to check authentication/authorization. ([#84768](https://github.com/kubernetes/kubernetes/pull/84768), [@liggitt](https://github.com/liggitt))

- The sample-apiserver aggregated conformance test has updated to use the Kubernetes v1.17.0 sample apiserver ([#84735](https://github.com/kubernetes/kubernetes/pull/84735), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Architecture, CLI and Testing]

* corrects a race condition in bootstrapping aggregated cluster roles in new HA clusters ([#63761](https://github.com/kubernetes/kubernetes/pull/63761), [@liggitt](https://github.com/liggitt))

- The `RemoteRequestHeaderUID` feature moves to beta and is now enabled by default. This makes the kube-apiserver propagate UIDs in the `X-Remote-Uid` header in requests to the aggregated API servers. The header is not honored by default for incoming requests, but that can be enabled by setting the `--requestheader-uid-headers` flag explicitly. ([#130560](https://github.com/kubernetes/kubernetes/pull/130560), [@stlaz](https://github.com/stlaz))...