Guest accounts invited and added to channels by Welcomebot plugin

{
  "id": "8a3bb6dc459ce4d0dd4139cfc51c17cf770c1b666b3395bc09b04fbc64025f34",
  "url": "https://osv.dev/vulnerability/CVE-2023-3613",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Guest accounts invited and added to channels by Welcomebot plugin",
    "summary": "Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.",
    "evidence": "osv:CVE-2023-3613",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2023-3613",
      "aliases": [
        "BIT-mattermost-2023-3613",
        "CVE-2023-3613"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mattermost/mattermost",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "96a934a6969ca6294450bcc60fc8ea1371488521"
                },
                {
                  "introduced": "c4d8c1450ab2b9538bbc2690ca1ee865567a5888"
                },
                {
                  "fixed": "cf5279c4598f3d49396d21ab539413173a159cf5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.8.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.9.0"
                      },
                      {
                        "fixed": "7.10.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v7.10.2",
            "v7.8.5",
            "v7.10.1",
            "v7.8.4",
            "v7.10.0",
            "v7.8.3",
            "cloud-2023-03-29-1",
            "v7.8.2",
            "v7.8.1",
            "v7.8.0",
            "cloud-2023-01-26-1",
            "cloud-2022-11-24-1",
            "cloud-2022-11-11-1",
            "cloud-2022-10-06-1",
            "cloud-2022-09-08-1",
            "cloud-2022-08-10-1",
            "cloud-2022-07-20-1",
            "v5.2.0-rc2",
            "v5.2.0-rc1",
            "v5.1.0-rc1",
            "v5.0.0-rc1",
            "v4.10.0-rc1",
            "v4.9.0-rc1",
            "v4.8.0-rc1",
            "v4.7.0-rc1",
            "v4.6.0-rc2",
            "v4.6.0-rc1",
            "v4.5.0-rc1",
            "v4.4.0-rc1",
            "v4.3.0-rc1",
            "v4.2.0-rc1",
            "v0.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3613.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.226732217Z",
      "provider": "osv",
      "references": [
        "https://mattermost.com/security-updates",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3613.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-3613"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "Mattermost",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "7.8.5"
                  },
                  {
                    "last_affected": "7.10.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3613.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-3613",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519972,
  "published_at": "2023-07-17T15:31:23.674+00:00"
}