{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "10.5.0"
              },
              {
                "fixed": "10.5.12"
              },
              {
                "introduced": "10.11.0"
              },
              {
                "fixed": "10.11.4"
              },
              {
                "introduced": "10.12.0"
              },
              {
                "fixed": "10.12.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "58bd34fd34cbd7d3da777d627b6cffdf8a532930"
            },
            {
              "fixed": "9fa25cd55b43d735a39c6925d7e0021697ae049d"
            },
            {
              "introduced": "5b955468ea1ea8b56c0fb10feb258a36a767d7bb"
            },
            {
              "fixed": "83a5be3f9ed65d8457ab8cca853826d0c8425a8b"
            },
            {
              "introduced": "ba3dc1612ce8f37bf9814b1ea6364181fb5abd62"
            },
            {
              "fixed": "6819e6e43e17a7a449727be2b7431f4a28477510"
            }
          ],
          "repo": "https://github.com/mattermost/mattermost-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Mattermost versions 10.11.x \u003c= 10.11.3, 10.5.x \u003c= 10.5.11, 10.12.x \u003c= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.",
  "id": "CVE-2025-55073",
  "modified": "2026-03-10T21:48:14.383210100Z",
  "published": "2025-11-14T08:15:45.687Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}