{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.1.7"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d49255b955cbeeb3a702d77009c85aae517ed1e4"
            },
            {
              "fixed": "6f0dc61958aa86a4b436a222f6176812ed5bbb95"
            }
          ],
          "repo": "https://github.com/simplemachines/smf",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43621.json"
  },
  "details": "Simple Machines Forum (SMF) through 2.1.7, fixed in commit 6f0dc61, contains an authorization state-confusion vulnerability in the profile loader that allows authenticated low-privileged users to gain administrator access by supplying multiple values for the user parameter. Attackers can exploit the mismatch between Profile::$member and User::$me-\u003eis_owner during sequential profile loading to be treated as the owner of an administrator profile, enabling unauthorized password changes and full account takeover.",
  "id": "CVE-2026-43621",
  "modified": "2026-08-30T03:30:29.277696068Z",
  "published": "2026-08-26T21:27:52.842Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43621.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43621"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/simple-machines-forum-authorization-confusion-via-profile-load"
    },
    {
      "type": "FIX",
      "url": "https://github.com/SimpleMachines/SMF/commit/6f0dc61958aa86a4b436a222f6176812ed5bbb95"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/SimpleMachines/SMF"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Simple Machines Forum \u003c 2.1.7 Authorization Confusion via Profile::load()"
}