CVE-2025-65954
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Simplesamlphp-module-casserver
PublishedMay 18, 2026
First seenMay 18, 2026
Weakness typeCWE-601Open redirect
How to fix
Update
- simplesamlphp simplesamlphp-module-casserver6.3.1 or later
- simplesamlphp/simplesamlphp-module-casserver7.0.0, 6.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| simplesamlphp simplesamlphp-module-casserver | v < 6.3.1, 7.0.0 | 6.3.1 |
| simplesamlphp/simplesamlphp-module-casserverPackagist | 7.0.0-rc1 ≤ v < 7.0.0, v < 6.3.1 | 7.0.0, 6.3.1 |
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