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

CWE

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

Assigner

GitHub_M

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
simplesamlphp	simplesamlphp-module-casserver	Affected: < 6.3.1 Affected: >= 7.0.0-rc1, < 7.0.0

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: 2026-05-27 14:25

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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              "versionEndExcluding": "6.3.1",
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            },
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  "lastModified": "2026-05-27T14:25:20.340",
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}

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

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        }
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  ],
  "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

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

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

FKIE_CVE-2025-65954

GHSA-CVRM-5HP6-H523

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature