Open Redirect in Simplesamlphp Simplesamlphp-casserver
CVE-2025-65954
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 trus…
Vulnerability class: Open Redirect
EPSS: 0.000 (1.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Simplesamlphp Simplesamlphp-casserver — versions 7.0.0
- Simplesamlphp Simplesamlphp_casserver — versions 7.0.0
- Simplesamlphp Simplesamlphp-module-casserver — versions >= 7.0.0-rc1, < 7.0.0, 7.0.0, < 6.3.1
Weakness classification (CWE)
References
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-65954?
- CVE-2025-65954 is a medium-severity vulnerability in Simplesamlphp Simplesamlphp-casserver, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-18.
- How severe is CVE-2025-65954?
- Medium severity. CVSS v3 base score is 6.1 out of 10.