Vulnerability-Lookup

WID-SEC-W-2025-2715

Vulnerability from csaf_certbund - Published: 2025-12-01 23:00 - Updated: 2025-12-01 23:00

Summary

Mattermost Server: Schwachstelle ermöglicht Offenlegung von Informationen

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

Mattermost ist ein webbasierter Instant-Messaging-Dienst.

Angriff

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Mattermost Server ausnutzen, um Informationen offenzulegen.

Betroffene Betriebssysteme

- Sonstiges - UNIX - Windows

JSON

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{
  "document": {
    "aggregate_severity": {
      "text": "niedrig"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Mattermost ist ein webbasierter Instant-Messaging-Dienst.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Mattermost Server ausnutzen, um Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2025-2715 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2715.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2025-2715 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2715"
      },
      {
        "category": "external",
        "summary": "Mattermost Security Updates vom 2025-12-01",
        "url": "https://mattermost.com/security-updates/"
      },
      {
        "category": "external",
        "summary": "CVE Record vom 2025-12-01",
        "url": "https://www.cve.org/CVERecord?id=CVE-2025-13870"
      }
    ],
    "source_lang": "en-US",
    "title": "Mattermost Server: Schwachstelle erm\u00f6glicht Offenlegung von Informationen",
    "tracking": {
      "current_release_date": "2025-12-01T23:00:00.000+00:00",
      "generator": {
        "date": "2025-12-02T12:27:13.499+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2025-2715",
      "initial_release_date": "2025-12-01T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2025-12-01T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Server \u003c11.1.0",
                "product": {
                  "name": "Mattermost Mattermost Server \u003c11.1.0",
                  "product_id": "T049012"
                }
              },
              {
                "category": "product_version",
                "name": "Server 11.1.0",
                "product": {
                  "name": "Mattermost Mattermost Server 11.1.0",
                  "product_id": "T049012-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mattermost:mattermost_server:server__11.1.0"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Server \u003c10.11.5",
                "product": {
                  "name": "Mattermost Mattermost Server \u003c10.11.5",
                  "product_id": "T049013"
                }
              },
              {
                "category": "product_version",
                "name": "Server 10.11.5",
                "product": {
                  "name": "Mattermost Mattermost Server 10.11.5",
                  "product_id": "T049013-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mattermost:mattermost_server:server__10.11.5"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Server \u003c10.5.13",
                "product": {
                  "name": "Mattermost Mattermost Server \u003c10.5.13",
                  "product_id": "T049014"
                }
              },
              {
                "category": "product_version",
                "name": "Server 10.5.13",
                "product": {
                  "name": "Mattermost Mattermost Server 10.5.13",
                  "product_id": "T049014-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mattermost:mattermost_server:server__10.5.13"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Mattermost"
          }
        ],
        "category": "vendor",
        "name": "Mattermost"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-13870",
      "product_status": {
        "known_affected": [
          "T049014",
          "T049013",
          "T049012"
        ]
      },
      "release_date": "2025-12-01T23:00:00.000+00:00",
      "title": "CVE-2025-13870"
    }
  ]
}

CVE-2025-13870 (GCVE-0-2025-13870)

Vulnerability from cvelistv5 – Published: 2025-12-02 09:28 – Updated: 2025-12-02 14:38

Title

Unauthorized access and subscription vulnerability in Boards

Summary

Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to

Severity ?

3.1 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

Mattermost

References

URL

Tags

https://mattermost.com/security-updates

Impacted products

	Vendor	Product	Version
	Mattermost	Mattermost	Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 10.11.5 Unaffected: 10.5.13

Credits

Doyensec

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-13870",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-02T14:38:15.737706Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-02T14:38:23.000Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost",
          "vendor": "Mattermost",
          "versions": [
            {
              "lessThanOrEqual": "10.11.4",
              "status": "affected",
              "version": "10.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.5.12",
              "status": "affected",
              "version": "10.5.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "11.1.0"
            },
            {
              "status": "unaffected",
              "version": "10.11.5"
            },
            {
              "status": "unaffected",
              "version": "10.5.13"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Doyensec"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost versions 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-02T09:28:44.436Z",
        "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, 10.11.5, 10.5.13 or higher."
        }
      ],
      "source": {
        "advisory": "MMSA-2025-00517",
        "defect": [
          "https://mattermost.atlassian.net/browse/MM-64970"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Unauthorized access and subscription vulnerability in Boards"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "cveId": "CVE-2025-13870",
    "datePublished": "2025-12-02T09:28:44.436Z",
    "dateReserved": "2025-12-02T09:10:03.197Z",
    "dateUpdated": "2025-12-02T14:38:23.000Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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

WID-SEC-W-2025-2715

CVE-2025-13870 (GCVE-0-2025-13870)

Tags

Sightings

Nomenclature