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

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-05 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

SUSE Rancher: before 2.5.6 — fixed in 2.5.6

How to fix

Upgrade to a fixed version: SUSE Rancher 2.5.6. Check the vendor advisory for mitigations.

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
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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