Read the docs
TI-2025-40522 Aliases CVE-2025-65954GHSA-cvrm-5hp6-h523

SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout

Priority MEDIUM 60CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed simplesamlphp-module-casserver (simplesamlphp): 6.3.1, 7.0.0simplesamlphp/simplesamlphp-module-casserver (Packagist): 7.0.0, 6.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
simplesamlphpsimplesamlphp-module-casserverbefore 6.3.1; 7.0.0-rc1 to before 7.0.06.3.1, 7.0.0Patch availableCNA
—simplesamlphp/simplesamlphp-module-casserver (Packagist)7.0.0-rc1 to before 7.0.07.0.0Patch availableGHSA-cvrm-5hp6-h523
—simplesamlphp/simplesamlphp-module-casserver (Packagist)before 6.3.16.3.1Patch availableGHSA-cvrm-5hp6-h523
  • simplesamlphp-module-casserver Vendorsimplesamlphp Affected before 6.3.1; 7.0.0-rc1 to before 7.0.0 Fixed in 6.3.1, 7.0.0 Patch available CNA
  • simplesamlphp/simplesamlphp-module-casserver (Packagist) Vendor— Affected 7.0.0-rc1 to before 7.0.0 Fixed in 7.0.0 Patch available GHSA-cvrm-5hp6-h523
  • simplesamlphp/simplesamlphp-module-casserver (Packagist) Vendor— Affected before 6.3.1 Fixed in 6.3.1 Patch available GHSA-cvrm-5hp6-h523

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:*:*:*:*:*:*:*:*before 6.3.1Vulnerablesimplesamlphp
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc1:*:*:*:*:*:*7.0.0 rc1Vulnerablesimplesamlphp
cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc2:*:*:*:*:*:*7.0.0 rc2Vulnerablesimplesamlphp
  • cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:*:*:*:*:*:*:*:* Versions before 6.3.1 Vulnerable ·simplesamlphp
  • cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc1:*:*:*:*:*:* Versions 7.0.0 rc1 Vulnerable ·simplesamlphp
  • cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc2:*:*:*:*:*:* Versions 7.0.0 rc2 Vulnerable ·simplesamlphp

Remediation

  • Fix · CNA simplesamlphp-module-casserver (simplesamlphp) Fixed in 6.3.1, 7.0.0
  • Fix · GHSA-cvrm-5hp6-h523 simplesamlphp/simplesamlphp-module-casserver (Packagist) Fixed in 7.0.0 Advisory →
  • Fix · GHSA-cvrm-5hp6-h523 simplesamlphp/simplesamlphp-module-casserver (Packagist) Fixed in 6.3.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-65954
  2. 2026-10-03 Alias added: GHSA-cvrm-5hp6-h523

References

Exploit 1

Patch 2

Advisory 1

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences