Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin

{
  "id": "2480850641fc949c8319a062a899c45e4e21053c0f09c11d494c3ae60b228137",
  "url": "https://osv.dev/vulnerability/CVE-2025-44004",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin",
    "summary": "Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subscription endpoint.",
    "evidence": "osv:CVE-2025-44004",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-44004",
      "aliases": [
        "CVE-2025-44004",
        "GHSA-6ff3-jgxh-vffj",
        "GO-2025-3865"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mattermost/mattermost-plugin-confluence",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "eccd0fdb6730a5a2e5a8e3f9636b27122f024e47"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:mattermost:confluence:*:*:*:*:*:mattermost:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.5.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.0-rc2",
            "v1.5.0-rc1",
            "v1.4.0-rc1",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.1.0-rc1",
            "v1.0.0",
            "v0.1.0-rc2",
            "v0.1.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-44004.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.393434181Z",
      "provider": "osv",
      "references": [
        "https://github.com/mattermost/mattermost-plugin-confluence/",
        "https://mattermost.com/security-updates",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/44xxx/CVE-2025-44004.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-44004"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306"
        ],
        "cna_assigner": "Mattermost",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/44xxx/CVE-2025-44004.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-44004",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505861,
  "published_at": "2025-08-11T18:56:58.269+00:00"
}