What’s Vulnerable › Vulnerabilities

CVE-2025-23389: Rancher does not Properly Validate Account Bindings in SAML Authentication Enables User Impersonation on First Login

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-11 · updated 2026-06-17
• Weakness: CWE-284

Description

A Improper Access Control vulnerability in SUSE rancher allows a local user to impersonate other identities through SAML Authentication on first login. This issue affects rancher: from 2.8.0 before 2.8.13, from 2.9.0 before 2.9.7, from 2.10.0 before 2.10.3.

Affected products

• SUSE Rancher: from 2.8.0 before 2.8.13; from 2.9.0 before 2.9.7; from 2.10.0 before 2.10.3 — fixed in 2.10.3, 2.8.13, 2.9.7

How to fix

Upgrade to a fixed version: SUSE Rancher 2.10.3, 2.8.13, 2.9.7. Check the vendor advisory for mitigations.

References

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23389
• https://github.com/rancher/rancher/security/advisories/GHSA-mq23-vvg7-xfm4

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