CVE-2021-25320: Rancher

Critical severity, CVSS 9.9. EPSS: 0.9% chance of exploitation in the next 30 days.

A Improper Access Control vulnerability in Rancher, allows users in the cluster to make request to cloud providers by creating requests with the cloud-credential ID. Rancher in this case would attach the requested credentials without further checks This issue affects: Rancher versions prior to 2.5.9; Rancher versions prior to 2.4.16.

Affected products

• Rancher Rancher: before 2.4.16 (fixed in 2.4.16); from 2.5.0, before 2.5.9 (fixed in 2.5.9)

Published 2021-07-15. Last modified 2026-06-17.