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CVE-2025-65954— SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout

Quick assessment

Affected
simplesamlphp simplesamlphp-module-casserver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SimpleSAMLphp-casserver是SimpleSAMLphp开源的一款CAS协议兼容的单点登录服务器模块。 SimpleSAMLphp-casserver 6.3.1之前版本和7.0.0之前版本存在输入验证错误漏洞，该漏洞源于注销端点将url查询参数视为可信，可能导致重定向或显示已注销页面。

AI Predicted 6.1 Difficulty: Easy EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
simplesamlphp simplesamlphp-module-casserver < 6.3.1 affected
>= 7.0.0-rc1, < 7.0.0 affected
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I. Basic Information for CVE-2025-65954

Vulnerability Information
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Vulnerability Title
SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout
Source: CVE Program / CVE List V5
Vulnerability Description
SimpleSAMLphp-casserver is a CAS 1.0 and 2.0 compliant CAS server in the form of a SimpleSAMLphp module. In versions below 6.3.1 and 7.0.0, the logout endpoint accepts a url query parameter to redirect to. casserver treats that url as trusted, and either (depending on configuration) redirects the browser there, or shows a "you've been logged out" page with a link to continue to that url. Impacted configs include 'enable_logout' => true, and 'skip_logout_page' -> true. This issue has been resolved in versions 6.3.1 and 7.0.0.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
SimpleSAMLphp-casserver 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SimpleSAMLphp-casserver是SimpleSAMLphp开源的一款CAS协议兼容的单点登录服务器模块。 SimpleSAMLphp-casserver 6.3.1之前版本和7.0.0之前版本存在输入验证错误漏洞，该漏洞源于注销端点将url查询参数视为可信，可能导致重定向或显示已注销页面。
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
simplesamlphp simplesamlphp-module-casserver < 6.3.1 -

II. Public POCs for CVE-2025-65954

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III. Intelligence Information for CVE-2025-65954

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Patches & Fixes for CVE-2025-65954 (2)

Vendor Advisories for CVE-2025-65954 (1)

IV. Related Vulnerabilities

Same product: simplesamlphp-module-casserver
Same vendor: simplesamlphp
Same weakness: CWE-601

V. Comments for CVE-2025-65954

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