What’s Vulnerable › Vulnerabilities

CVE-2021-25320: Rancher: Cloud credentials can be used through proxy API by users without access

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-15 · updated 2026-06-17
• Weakness: CWE-284

Description

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: before 2.4.16; from 2.5.0 before 2.5.9 — fixed in 2.4.16, 2.5.9

How to fix

Upgrade to a fixed version: Rancher 2.4.16, 2.5.9. Check the vendor advisory for mitigations.

References

• https://bugzilla.suse.com/show_bug.cgi?id=1185514
• https://bugzilla.suse.com/show_bug.cgi?id=1185514

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