CVE-2025-65954
Published:May 18, 2026
Updated:June 11, 2026
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 Packages
https://github.com/simplesamlphp/simplesamlphp-module-casserver.git (GITHUB):
Affected version(s) >=v6.0.0 <v6.3.1Fix Suggestion:
Update to version v6.3.1https://github.com/simplesamlphp/simplesamlphp-module-casserver.git (GITHUB):
Affected version(s) >=v7.0.0-rc1 <v7.0.0Fix Suggestion:
Update to version v7.0.0simplesamlphp/simplesamlphp-module-casserver (PHP):
Affected version(s) >=dev-release-6.1 <v6.3.1Fix Suggestion:
Update to version v6.3.1simplesamlphp/simplesamlphp-module-casserver (PHP):
Affected version(s) >=dev-release-6.1 <v6.3.1Fix Suggestion:
Update to version v6.3.1simplesamlphp/simplesamlphp-module-casserver (PHP):
Affected version(s) >=v7.0.0-rc1 <v7.0.0Fix Suggestion:
Update to version v7.0.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.7
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
URL Redirection to Untrusted Site ('Open Redirect')
EPSS
Base Score:
0.01