CVE-2025-12419 (GCVE-0-2025-12419)

Vulnerability from cvelistv5 – Published: 2025-11-27 15:55 – Updated: 2026-02-26 16:07
VLAI
Title
Account takeover on OAuth/OpenID-enabled servers
Summary
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 04:55 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
Mattermost CNA under the mitre root
CNA scorecard B 80/100 over 123 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mattermost Mattermost Affected: 10.12.0 , ≤ 10.12.1 (semver)
Affected: 10.11.0 , ≤ 10.11.4 (semver)
Affected: 10.5.0 , ≤ 10.5.12 (semver)
Affected: 11.0.0 , ≤ 11.0.3 (semver)
Unaffected: 11.1.0
Unaffected: 10.12.2
Unaffected: 10.11.5
Unaffected: 10.5.13
Unaffected: 11.0.4
guessed Create a notification for this product.
Credits
daw10
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-12419",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-02T04:55:59.011337Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T16:07:27.036Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost",
          "vendor": "Mattermost",
          "versions": [
            {
              "lessThanOrEqual": "10.12.1",
              "status": "affected",
              "version": "10.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.11.4",
              "status": "affected",
              "version": "10.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.5.12",
              "status": "affected",
              "version": "10.5.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "11.0.3",
              "status": "affected",
              "version": "11.0.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "11.1.0"
            },
            {
              "status": "unaffected",
              "version": "10.12.2"
            },
            {
              "status": "unaffected",
              "version": "10.11.5"
            },
            {
              "status": "unaffected",
              "version": "10.5.13"
            },
            {
              "status": "unaffected",
              "version": "11.0.4"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "daw10"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost versions 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12, 11.0.x \u003c= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-303",
              "description": "CWE-303: Incorrect Implementation of Authentication Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-27T17:18:07.520Z",
        "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "shortName": "Mattermost"
      },
      "references": [
        {
          "url": "https://mattermost.com/security-updates"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update Mattermost to versions 11.1.0, 10.12.2, 10.11.5, 10.5.13, 11.0.4 or higher."
        }
      ],
      "source": {
        "advisory": "MMSA-2025-00547",
        "defect": [
          "https://mattermost.atlassian.net/browse/MM-66371"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Account takeover on OAuth/OpenID-enabled servers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "cveId": "CVE-2025-12419",
    "datePublished": "2025-11-27T15:55:44.815Z",
    "dateReserved": "2025-10-28T16:09:58.730Z",
    "dateUpdated": "2026-02-26T16:07:27.036Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-12419",
      "date": "2026-10-22",
      "epss": "0.00345",
      "percentile": "0.26784"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Mattermost",
                "vendor": "Mattermost",
                "versions": [
                  {
                    "lessThanOrEqual": "10.12.1",
                    "status": "affected",
                    "version": "10.12.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "10.11.4",
                    "status": "affected",
                    "version": "10.11.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "10.5.12",
                    "status": "affected",
                    "version": "10.5.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "11.0.3",
                    "status": "affected",
                    "version": "11.0.0",
                    "versionType": "semver"
                  },
                  {
                    "status": "unaffected",
                    "version": "11.1.0"
                  },
                  {
                    "status": "unaffected",
                    "version": "10.12.2"
                  },
                  {
                    "status": "unaffected",
                    "version": "10.11.5"
                  },
                  {
                    "status": "unaffected",
                    "version": "10.5.13"
                  },
                  {
                    "status": "unaffected",
                    "version": "11.0.4"
                  }
                ]
              }
            ],
            "source": "responsibledisclosure@mattermost.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "91D99F7F-B4EE-447C-9B77-82DD64B1D83A",
                    "versionEndExcluding": "10.5.13",
                    "versionStartIncluding": "10.5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A8368192-621C-4043-827E-DB4F6946AD92",
                    "versionEndExcluding": "10.11.5",
                    "versionStartIncluding": "10.11.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "ED48D731-6490-4DD5-94D4-EE4555BB93ED",
                    "versionEndExcluding": "10.12.2",
                    "versionStartIncluding": "10.12.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "387D98AD-59D7-4783-B0D2-E5CF2F7343B0",
                    "versionEndExcluding": "11.0.4",
                    "versionStartIncluding": "11.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Mattermost versions 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12, 11.0.x \u003c= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."
          },
          {
            "lang": "es",
            "value": "Las versiones de Mattermost 10.12.x menor o igual que 10.12.1, 10.11.x menor o igual que 10.11.4, 10.5.x menor o igual que 10.5.12, 11.0.x menor o igual que 11.0.3 no validan correctamente los tokens de estado de OAuth durante la autenticaci\u00f3n de OpenID Connect, lo que permite a un atacante autenticado con privilegios de creaci\u00f3n de equipos tomar el control de una cuenta de usuario mediante la manipulaci\u00f3n de datos de autenticaci\u00f3n durante el flujo de finalizaci\u00f3n de OAuth. Esto requiere que la verificaci\u00f3n de correo electr\u00f3nico est\u00e9 deshabilitada (predeterminado: deshabilitado), que OAuth/OpenID Connect est\u00e9 habilitado, y que el atacante controle dos usuarios en el sistema SSO, uno de los cuales nunca haya iniciado sesi\u00f3n en Mattermost."
          }
        ],
        "id": "CVE-2025-12419",
        "lastModified": "2026-10-19T13:10:00.110",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.9,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.1,
              "impactScore": 6.0,
              "source": "responsibledisclosure@mattermost.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-12419",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-02T04:55:59.011337Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-11-27T16:15:46.957",
        "references": [
          {
            "source": "responsibledisclosure@mattermost.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://mattermost.com/security-updates"
          }
        ],
        "sourceIdentifier": "responsibledisclosure@mattermost.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-303"
              }
            ],
            "source": "responsibledisclosure@mattermost.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T09:08:34+00:00",
      "cve": "CVE-2025-12419",
      "id": "CVE-2025-12419",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Account takeover on OAuth/OpenID-enabled servers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-12419.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-12419",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-11-28T15:21:17.019456Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-11-28T15:21:21.369Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Mattermost",
              "vendor": "Mattermost",
              "versions": [
                {
                  "lessThanOrEqual": "10.12.1",
                  "status": "affected",
                  "version": "10.12.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "10.11.4",
                  "status": "affected",
                  "version": "10.11.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "10.5.12",
                  "status": "affected",
                  "version": "10.5.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "11.0.3",
                  "status": "affected",
                  "version": "11.0.0",
                  "versionType": "semver"
                },
                {
                  "status": "unaffected",
                  "version": "11.1.0"
                },
                {
                  "status": "unaffected",
                  "version": "10.12.2"
                },
                {
                  "status": "unaffected",
                  "version": "10.11.5"
                },
                {
                  "status": "unaffected",
                  "version": "10.5.13"
                },
                {
                  "status": "unaffected",
                  "version": "11.0.4"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "daw10"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Mattermost versions 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12, 11.0.x \u003c= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.9,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-303",
                  "description": "CWE-303: Incorrect Implementation of Authentication Algorithm",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-11-27T17:18:07.520Z",
            "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
            "shortName": "Mattermost"
          },
          "references": [
            {
              "url": "https://mattermost.com/security-updates"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "value": "Update Mattermost to versions 11.1.0, 10.12.2, 10.11.5, 10.5.13, 11.0.4 or higher."
            }
          ],
          "source": {
            "advisory": "MMSA-2025-00547",
            "defect": [
              "https://mattermost.atlassian.net/browse/MM-66371"
            ],
            "discovery": "EXTERNAL"
          },
          "title": "Account takeover on OAuth/OpenID-enabled servers"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "assignerShortName": "Mattermost",
        "cveId": "CVE-2025-12419",
        "datePublished": "2025-11-27T15:55:44.815Z",
        "dateReserved": "2025-10-28T16:09:58.730Z",
        "dateUpdated": "2025-12-02T04:55:58.042Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.