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CVE-2025-65954

Status: AnalyzedMedium (6.1)—

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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Simplesamlphp — Simplesamlphp-module-casserver

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2025-65954",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-65954",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-18T20:27:41.760236Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 4.7,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "simplesamlphp",
          "product": "simplesamlphp-module-casserver",
          "versions": [
            {
              "status": "affected",
              "version": "< 6.3.1"
            },
            {
              "status": "affected",
              "version": ">= 7.0.0-rc1,  < 7.0.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-18T20:16:36.980",
  "references": [
    {
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/0462f50f00b3bb300d83067d11b74146a57bb8e0",
      "tags": [
        "Patch"
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      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/fb6c6f1c7b9e757c93c5c306e1d36405e64f6dc5",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "SimpleSAMLphp-casserver es un servidor CAS compatible con CAS 1.0 y 2.0 en forma de un módulo SimpleSAMLphp. En versiones anteriores a la 6.3.1 y 7.0.0, el endpoint de cierre de sesión acepta un parámetro de consulta url para redirigir. casserver trata esa url como de confianza, y (dependiendo de la configuración) o bien redirige el navegador allí, o muestra una página de 'has cerrado sesión' con un enlace para continuar a esa url. Las configuraciones afectadas incluyen enable_logout => true, y skip_logout_page  ->  true. Este problema ha sido resuelto en las versiones 6.3.1 y 7.0.0."
    }
  ],
  "lastModified": "2026-09-30T21:10:00.190",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2969E814-23D3-4806-8A0F-4524711297DF",
              "versionEndExcluding": "6.3.1"
            },
            {
              "criteria": "cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "05D41ED1-4CC7-4CC9-BCB7-717E12F6B596"
            },
            {
              "criteria": "cpe:2.3:a:simplesamlphp:simplesamlphp-module-casserver:7.0.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "19B5B2BA-A49D-4ED8-B048-494B65490560"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}