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.
Affected products
simplesamlphp: simplesamlphp-module-casserver
References4
- github.com/simplesamlphp/simplesamlphp-module-casserver/securit… ExploitVendor Advisory
- github.com/simplesamlphp/simplesamlphp-module-casserver/securit… ExploitVendor Advisory
- github.com/simplesamlphp/simplesamlphp-module-casserver/commit/… Patch
- github.com/simplesamlphp/simplesamlphp-module-casserver/commit/… Patch
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 19 · as of 14 November 2026
- CWE
- CWE-601
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