Vulnerability-Lookup

CVE-2025-65954 (GCVE-0-2025-65954)

Vulnerability from cvelistv5 – Published: 2026-05-18 19:57 – Updated: 2026-05-18 20:28

Title

SimpleSAMLphp-casserver has an Open Redirect vulnerability via logout

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.

Severity

4.7 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-18 20:27 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7616 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/simplesamlphp/simplesamlphp-mo…	x_refsource_CONFIRM
https://github.com/simplesamlphp/simplesamlphp-mo…	x_refsource_MISC
https://github.com/simplesamlphp/simplesamlphp-mo…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
simplesamlphp	simplesamlphp-module-casserver	Affected: < 6.3.1 Affected: >= 7.0.0-rc1, < 7.0.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-65954

Vulnerability from fkie_nvd - Published: 2026-05-18 20:16 - Updated: 2026-10-07 08:10

Severity

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/0462f50f00b3bb300d83067d11b74146a57bb8e0	Patch
security-advisories@github.com	https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/fb6c6f1c7b9e757c93c5c306e1d36405e64f6dc5	Patch
security-advisories@github.com	https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523	Exploit, Vendor Advisory

Impacted products

Vendor	Product	Version
simplesamlphp	simplesamlphp-module-casserver	*
simplesamlphp	simplesamlphp-module-casserver	7.0.0
simplesamlphp	simplesamlphp-module-casserver	7.0.0

JSON

To clipboard

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    {
      "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\u0027ve been logged out\" page with a link to continue to that url. Impacted configs include \u0027enable_logout\u0027 =\u003e true, and \u0027skip_logout_page\u0027 -\u003e 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 m\u00f3dulo SimpleSAMLphp. En versiones anteriores a la 6.3.1 y 7.0.0, el endpoint de cierre de sesi\u00f3n acepta un par\u00e1metro de consulta url para redirigir. casserver trata esa url como de confianza, y (dependiendo de la configuraci\u00f3n) o bien redirige el navegador all\u00ed, o muestra una p\u00e1gina de \u0027has cerrado sesi\u00f3n\u0027 con un enlace para continuar a esa url. Las configuraciones afectadas incluyen enable_logout =\u003e true, y skip_logout_page    -\u003e    true. Este problema ha sido resuelto en las versiones 6.3.1 y 7.0.0."
    }
  ],
  "id": "CVE-2025-65954",
  "lastModified": "2026-10-07T08:10:00.200",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-65954",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-18T20:27:41.760236Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-18T20:16:36.980",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/0462f50f00b3bb300d83067d11b74146a57bb8e0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/fb6c6f1c7b9e757c93c5c306e1d36405e64f6dc5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-CVRM-5HP6-H523

Vulnerability from github – Published: 2026-05-15 16:21 – Updated: 2026-05-19 16:08

Summary

SimpleSAMLphp casserver: Open Redirect in logout

Details

Summary

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.

There are a number of other things broken with logout in 7 (cas v3 uses a different query parameters, etc)

Details

https://github.com/simplesamlphp/simplesamlphp-module-casserver/blob/21418f7efbea8c4f078fd4a7d1b9eacf94dd4941/src/Controller/LogoutController.php#L104

Previous module checked the url against the valid service urls.

PoC

The docker instructions from the README.md run an image with a vulnerable config.

Accessing https://localhost/cas/logout?url=https://google.com will redirect to Google

Impact

Impacted configs have

'enable_logout' => true,

and are most impacted if they also have

'skip_logout_page' -> true,

Severity

4.7 (Medium)


                  
                    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 7.0.0-rc3"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "simplesamlphp/simplesamlphp-module-casserver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0-rc1"
            },
            {
              "fixed": "7.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "simplesamlphp/simplesamlphp-module-casserver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-65954"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-15T16:21:13Z",
    "nvd_published_at": "2026-05-18T20:16:36Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe 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\u0027ve been logged out\" page with a link to continue to that url.\n\nThere are a number of other things broken with logout in 7 (cas v3 uses a different query parameters, etc)\n\n### Details\n\nhttps://github.com/simplesamlphp/simplesamlphp-module-casserver/blob/21418f7efbea8c4f078fd4a7d1b9eacf94dd4941/src/Controller/LogoutController.php#L104\n\nPrevious module checked the url against the valid service urls.\n\n### PoC\n\nThe docker instructions from the README.md run an image with a vulnerable config. \n\nAccessing  https://localhost/cas/logout?url=https://google.com  will redirect to Google\n\n### Impact\n\nImpacted configs have\n\n```php\n\u0027enable_logout\u0027 =\u003e true,\n```\n\nand are most impacted if they also have\n\n```\n\u0027skip_logout_page\u0027 -\u003e true,\n```",
  "id": "GHSA-cvrm-5hp6-h523",
  "modified": "2026-05-19T16:08:50Z",
  "published": "2026-05-15T16:21:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-cvrm-5hp6-h523"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65954"
    },
    {
      "type": "WEB",
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/0462f50f00b3bb300d83067d11b74146a57bb8e0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/fb6c6f1c7b9e757c93c5c306e1d36405e64f6dc5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver"
    },
    {
      "type": "WEB",
      "url": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/blob/21418f7efbea8c4f078fd4a7d1b9eacf94dd4941/src/Controller/LogoutController.php#L104"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SimpleSAMLphp casserver: Open Redirect in logout"
}

Sightings

Author	Source	Type	Date	Other

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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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CVE-2025-65954 (GCVE-0-2025-65954)

FKIE_CVE-2025-65954

GHSA-CVRM-5HP6-H523

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