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

Quick assessment

Affected
SUSE rancher
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher是美国Rancher开源的一个开源容器管理平台，专为在生产环境中部署容器的组织而构建。 Rancher 2.8.0至2.8.13之前版本、2.9.0至2.9.7之前版本和2.10.0至2.10.3之前版本存在访问控制错误漏洞，该漏洞源于本地用户可以通过SAML身份验证在首次登录时冒充其他身份。

CVSS 8.4 · High EPSS 0.47% · P39
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I. Basic Information for CVE-2025-23389

Vulnerability Information
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Vulnerability Title
Rancher does not Properly Validate Account Bindings in SAML Authentication Enables User Impersonation on First Login
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher是美国Rancher开源的一个开源容器管理平台，专为在生产环境中部署容器的组织而构建。 Rancher 2.8.0至2.8.13之前版本、2.9.0至2.9.7之前版本和2.10.0至2.10.3之前版本存在访问控制错误漏洞，该漏洞源于本地用户可以通过SAML身份验证在首次登录时冒充其他身份。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE rancher 2.8.0 ~ 2.8.13 -

II. Public POCs for CVE-2025-23389

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 14122 chars
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III. Intelligence Information for CVE-2025-23389

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Vendor Advisories for CVE-2025-23389 (2)

Same Patch Batch · SUSE · 2025-04-11 · 6 CVEs total

CVE-2025-23391 9.1 CRITICAL Rancher: Restricted Administrator can change Administrator's passwords
CVE-2025-23388 8.2 HIGH Unauthenticated stack overflow in /v3-public/authproviders API
CVE-2024-52280 7.7 HIGH Users can issue watch commands for arbitrary resources
CVE-2024-52282 6.2 MEDIUM Rancher Helm Applications may have sensitive values leaked
CVE-2025-23387 5.3 MEDIUM Rancher's SAML-based login via CLI can be denied by unauthenticated users

IV. Related Vulnerabilities

Same product: rancher
Same vendor: SUSE
Same weakness: CWE-284

V. Comments for CVE-2025-23389

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