CRITICALCVSS 10.0Vulnerability
CVE-2021-25320
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.
Properties
- Severity
- critical
- Summary
- Rancher cloud credentials can be used through proxy API by users without access
- Epss score
- 0.00855
- Cvss score
- 10
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Ghsa published
- 2026-03-03T14:52:15Z
- Source url
- https://github.com/advisories/GHSA-gqf8-rvrh-g7w6
- Ghsa updated
- 2026-03-03T14:52:16Z
- Ghsa id
- GHSA-gqf8-rvrh-g7w6
- Last source
- FIRST EPSS
- Cve id
- CVE-2021-25320
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Is ghsa only
- false
- Epss percentile
- 0.57712
Related Entities (2)
AFFECTS (1)
HAS_WEAKNESS (1)
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