Vulnerability-Lookup

CVE-2025-27509 (GCVE-0-2025-27509)

Vulnerability from cvelistv5 – Published: 2025-03-06 19:00 – Updated: 2025-03-06 19:29

Title

SAML authentication vulnerability due to improper SAML response validation

Summary

fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-06 19:29 UTC

CWE

CWE-285 - Improper Authorization

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/fleetdm/fleet/security/advisor…	x_refsource_CONFIRM
https://github.com/fleetdm/fleet/commit/718c95e47…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
fleetdm	fleet	Affected: >= 4.64.0, < 4.64.2 Affected: >= 4.63.0, < 4.63.2 Affected: >= 4.62.0, < 4.62.4 Affected: < 4.58.1	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-27509",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-06T19:29:18.572033Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-06T19:29:47.248Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "fleet",
          "vendor": "fleetdm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.64.0, \u003c 4.64.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.63.0, \u003c 4.63.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.62.0, \u003c 4.62.4"
            },
            {
              "status": "affected",
              "version": "\u003c 4.58.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285: Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-03-06T19:00:36.098Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"
        },
        {
          "name": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"
        }
      ],
      "source": {
        "advisory": "GHSA-52jx-g6m5-h735",
        "discovery": "UNKNOWN"
      },
      "title": "SAML authentication vulnerability due to improper SAML response validation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-27509",
    "datePublished": "2025-03-06T19:00:36.098Z",
    "dateReserved": "2025-02-26T18:11:52.306Z",
    "dateUpdated": "2025-03-06T19:29:47.248Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-27509",
      "date": "2026-09-19",
      "epss": "0.00656",
      "percentile": "0.49958"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "fleet",
                "vendor": "fleetdm",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 4.64.0, \u003c 4.64.2"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 4.63.0, \u003c 4.63.2"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 4.62.0, \u003c 4.62.4"
                  },
                  {
                    "status": "affected",
                    "version": "\u003c 4.58.1"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1."
          },
          {
            "lang": "es",
            "value": "fleedm/fleet es un sistema de gesti\u00f3n de dispositivos de c\u00f3digo abierto, basado en osquery. En versiones vulnerables de Fleet, un atacante podr\u00eda crear una respuesta SAML especialmente manipulada para falsificar las afirmaciones de autenticaci\u00f3n, proporcionar una nueva cuenta de usuario administrativo si el aprovisionamiento Just-In-Time (JIT) est\u00e1 habilitado o crear nuevas cuentas vinculadas a afirmaciones falsificadas si la inscripci\u00f3n a MDM est\u00e1 habilitada. Esta vulnerabilidad se ha corregido en 4.64.2, 4.63.2, 4.62.4 y 4.58.1."
          }
        ],
        "id": "CVE-2025-27509",
        "lastModified": "2026-06-17T09:03:43.793",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 9.3,
                "baseSeverity": "CRITICAL",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-27509",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-06T19:29:18.572033Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-03-06T19:15:27.973",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-285"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-05-28T17:30:52+00:00",
      "cve": "CVE-2025-27509",
      "id": "CVE-2025-27509",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "SAML authentication vulnerability due to improper SAML response validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-27509.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-27509",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-03-06T19:29:18.572033Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-03-06T19:29:28.409Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "fleet",
              "vendor": "fleetdm",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003e= 4.64.0, \u003c 4.64.2"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 4.63.0, \u003c 4.63.2"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 4.62.0, \u003c 4.62.4"
                },
                {
                  "status": "affected",
                  "version": "\u003c 4.58.1"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 9.3,
                "baseSeverity": "CRITICAL",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-285",
                  "description": "CWE-285: Improper Authorization",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-03-06T19:00:36.098Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"
            },
            {
              "name": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"
            }
          ],
          "source": {
            "advisory": "GHSA-52jx-g6m5-h735",
            "discovery": "UNKNOWN"
          },
          "title": "SAML authentication vulnerability due to improper SAML response validation"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2025-27509",
        "datePublished": "2025-03-06T19:00:36.098Z",
        "dateReserved": "2025-02-26T18:11:52.306Z",
        "dateUpdated": "2025-03-06T19:29:47.248Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2025-27509

Vulnerability from fkie_nvd - Published: 2025-03-06 19:15 - Updated: 2026-06-17 09:03

Severity

9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb
	security-advisories@github.com	https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "fleet",
          "vendor": "fleetdm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.64.0, \u003c 4.64.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.63.0, \u003c 4.63.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.62.0, \u003c 4.62.4"
            },
            {
              "status": "affected",
              "version": "\u003c 4.58.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1."
    },
    {
      "lang": "es",
      "value": "fleedm/fleet es un sistema de gesti\u00f3n de dispositivos de c\u00f3digo abierto, basado en osquery. En versiones vulnerables de Fleet, un atacante podr\u00eda crear una respuesta SAML especialmente manipulada para falsificar las afirmaciones de autenticaci\u00f3n, proporcionar una nueva cuenta de usuario administrativo si el aprovisionamiento Just-In-Time (JIT) est\u00e1 habilitado o crear nuevas cuentas vinculadas a afirmaciones falsificadas si la inscripci\u00f3n a MDM est\u00e1 habilitada. Esta vulnerabilidad se ha corregido en 4.64.2, 4.63.2, 4.62.4 y 4.58.1."
    }
  ],
  "id": "CVE-2025-27509",
  "lastModified": "2026-06-17T09:03:43.793",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-27509",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-06T19:29:18.572033Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-03-06T19:15:27.973",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-52JX-G6M5-H735

Vulnerability from github – Published: 2025-03-06 19:12 – Updated: 2026-01-21 16:51

Summary

Fleet has SAML authentication vulnerability due to improper SAML response validation

Details

Summary

A vulnerability in Fleet’s SAML authentication handling could allow an attacker to forge authentication assertions and gain unauthorized access to Fleet. In certain configurations, this could result in the creation of new user accounts, including administrative accounts. This issue affects Fleet deployments using single sign-on (SSO).

Impact

In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to:

Forge authentication assertions, potentially impersonating legitimate users.
If Just-In-Time (JIT) provisioning is enabled, the attacker could provision a new administrative user account.
If MDM enrollment is enabled, certain endpoints could be used to create new accounts tied to forged assertions.

This could allow unauthorized access to Fleet, including administrative access, visibility into device data, and modification of configuration.

Patches

This issue is addressed in commit fc96cc4 and is available in Fleet version 4.64.2.

The following backport versions also address this issue:

4.63.2
4.62.4
4.58.1
4.53.2

Workarounds

If an immediate upgrade is not possible, Fleet users should temporarily disable single-sign-on (SSO) and use password authentication.

Credit

Thank you @hakivvi, as well as Jeffrey Hofmann and Colby Morgan from the Robinhood Red Team for finding and reporting this vulnerability using our responsible disclosure process.

For more information

If you have any questions or comments about this advisory:

Email us at security@fleetdm.com
Join #fleet in osquery Slack

Severity

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/fleetdm/fleet/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.64.0"
            },
            {
              "fixed": "4.64.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/fleetdm/fleet/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.63.0"
            },
            {
              "fixed": "4.63.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/fleetdm/fleet/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.62.0"
            },
            {
              "fixed": "4.62.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/fleetdm/fleet/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.54.0"
            },
            {
              "fixed": "4.58.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/fleetdm/fleet/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.53.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-27509"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285",
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-06T19:12:27Z",
    "nvd_published_at": "2025-03-06T19:15:27Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\nA vulnerability in Fleet\u2019s SAML authentication handling could allow an attacker to forge authentication assertions and gain unauthorized access to Fleet. In certain configurations, this could result in the creation of new user accounts, including administrative accounts. This issue affects Fleet deployments using single sign-on (SSO).\n\n### Impact\n\nIn vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to:\n\n- Forge authentication assertions, potentially impersonating legitimate users.\n- If Just-In-Time (JIT) provisioning is enabled, the attacker could provision a new administrative user account.\n- If MDM enrollment is enabled, certain endpoints could be used to create new accounts tied to forged assertions.\n\nThis could allow unauthorized access to Fleet, including administrative access, visibility into device data, and modification of configuration. \n\n### Patches\n\nThis issue is addressed in commit [fc96cc4](https://github.com/fleetdm/fleet/commit/fc96cc4e91047250afb12f65ad70e90b30a7fb1c) and is available in Fleet version 4.64.2.\n\nThe following backport versions also address this issue: \n\n- 4.63.2\n- 4.62.4\n- 4.58.1\n- 4.53.2\n\n### Workarounds\n\nIf an immediate upgrade is not possible, Fleet users should temporarily disable [single-sign-on (SSO)](https://fleetdm.com/docs/deploy/single-sign-on-sso) and use password authentication.\n\n### Credit\n\nThank you @hakivvi, as well as Jeffrey Hofmann and Colby Morgan from the Robinhood Red Team for finding and reporting this vulnerability using our [responsible disclosure process](https://github.com/fleetdm/fleet/blob/main/SECURITY.md).\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n- Email us at security@fleetdm.com\n- Join #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)",
  "id": "GHSA-52jx-g6m5-h735",
  "modified": "2026-01-21T16:51:42Z",
  "published": "2025-03-06T19:12:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27509"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fleetdm/fleet"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fleetdm/fleet/releases/tag/fleet-v4.64.2"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-3505"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Fleet has SAML authentication vulnerability due to improper SAML response validation"
}

OPENSUSE-SU-2025:14889-1

Vulnerability from csaf_opensuse - Published: 2025-03-13 00:00 - Updated: 2025-03-13 00:00

Summary

govulncheck-vulndb-0.0.20250312T181707-1.1 on GA media

Severity

Moderate

Scope

31 vulnerabilities in this advisory, including CVE-2025-27509.

CVE-2025-27509

Recommended: 4 products

Open the full advisory

WID-SEC-W-2025-0522

Vulnerability from csaf_certbund - Published: 2025-03-10 23:00 - Updated: 2025-03-10 23:00

Summary

Fleet: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Hoch

Scope

1 vulnerability in this advisory, including CVE-2025-27509.

CVE-2025-27509

Known affected: 1 product

Open the full advisory

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-27509 (GCVE-0-2025-27509)

FKIE_CVE-2025-27509

GHSA-52JX-G6M5-H735

Summary

Impact

Patches

Workarounds

Credit

For more information

OPENSUSE-SU-2025:14889-1

WID-SEC-W-2025-0522

Tags

Sightings

Nomenclature

Related by attack behaviour