CVE-2025-65954

SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout

Published May 18, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-cvrm-5hp6-h523 SimpleSAMLphp casserver: Open Redirect in logout
History
Type Values Removed Values Added
CPEs cpe:2.3:a:simplesamlphp:simplesamlphp-casserver:*:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp-casserver:7.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp_casserver:7.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:*:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc2:*:*:*:*:*:*
Vendors & Products Simplesamlphp simplesamlphp-casserver
Simplesamlphp simplesamlphp Casserver
Type Values Removed Values Added
First Time appeared Simplesamlphp simplesamlphp-casserver
Simplesamlphp simplesamlphp Casserver
CPEs cpe:2.3:a:simplesamlphp:simplesamlphp-casserver:*:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp-casserver:7.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp_casserver:7.0.0:rc1:*:*:*:*:*:*
Vendors & Products Simplesamlphp simplesamlphp-casserver
Simplesamlphp simplesamlphp Casserver
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Simplesamlphp
Simplesamlphp simplesamlphp-module-casserver
Vendors & Products Simplesamlphp
Simplesamlphp simplesamlphp-module-casserver
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout
Weaknesses CWE-601
References
Metrics cvssV3_0

{'score': 4.7, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 18, 2026, 8:28 PM
Reserved
Nov 18, 2025, 4:14 PM
Status
Analyzed
Published
May 18, 2026, 8:16 PM
Modified
Oct 7, 2026, 8:10 AM