{"id":"CVE-2021-25320","aliases":["GHSA-gqf8-rvrh-g7w6","GO-2026-4589"],"url":"https://o3.security/vulnerability/CVE-2021-25320","summary":"Rancher cloud credentials can be used through proxy API by users without access","details":"A vulnerability was discovered in Rancher 2.2.0 through the aforementioned patched versions, where cloud credentials weren't being properly validated through the Rancher API. Specifically through a proxy designed to communicate with cloud providers. Any Rancher user that was logged-in and aware of a cloud-credential ID that was valid for a given cloud provider, could call that cloud provider's API through the proxy API, and the cloud-credential would be attached. The exploit is limited to valid Rancher users. There is not a direct mitigation outside of upgrading to the patched Rancher versions.","published":"2021-07-15T09:15:08.143Z","modified":"2026-10-24T10:30:24.063479377Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.00848,"percentile":0.56388,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.4.16"},{"ecosystem":"Go","name":"github.com/rancher/rancher","fixedVersion":"2.5.9"}],"fix":null,"references":[{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=1185514"},{"type":"WEB","url":"https://github.com/rancher/rancher/security/advisories/GHSA-gqf8-rvrh-g7w6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25320"},{"type":"PACKAGE","url":"https://github.com/rancher/rancher"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:24.063479377Z"}}