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Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 Cross-Organization Access Control Bypass via members_assignment.php

Type: advisorySources: OSV

Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 contains a broken access control vulnerability that allows role administrators to assign users to roles in other organizations. Attackers can submit crafted assign requests to members_assignment.php with a foreign role UUID to gain privileged membership, log into that organization, and edit its user profiles.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-109329
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 18:22 UTC · Revision 1

Source evidence

Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 Cross-Organization Access Control Bypass via members_assignment.php

core-osv · Original source

Published 12 Oct 2026, 16:05 UTC

Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 contains a broken access control vulnerability that allows role administrators to assign users to roles in other organizations. Attackers can submit crafted assign requests to members_assignment.php with a foreign role UUID to gain privileged membership, log into that organization, and edit its user profiles.

osv:CVE-2026-109329
Complete source record
{
  "id": "ddcf3e86e4d20f480852bc6c914ef2b0d7bc0bedd03fc01f78cb54bb34458c75",
  "url": "https://osv.dev/vulnerability/CVE-2026-109329",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 Cross-Organization Access Control Bypass via members_assignment.php",
    "summary": "Admidio 4.3.2 through 4.3.17 and 5.0.0 before 5.0.15 contains a broken access control vulnerability that allows role administrators to assign users to roles in other organizations. Attackers can submit crafted assign requests to members_assignment.php with a foreign role UUID to gain privileged membership, log into that organization, and edit its user profiles.",
    "evidence": "osv:CVE-2026-109329",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-109329",
      "aliases": [
        "CVE-2026-109329",
        "GHSA-ggch-5cpv-rvqx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/admidio/admidio",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f89cf54da2e1dca5b2655657b320cd1d88a7c16d"
                },
                {
                  "last_affected": "fde81ae869e88a3cf42201f2548d57df785a37cb"
                },
                {
                  "introduced": "59b4888d2be8acb9801f3024258663f7a787518c"
                },
                {
                  "fixed": "929684e27d40eadf18c93e6725807d208d54b2ce"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.3.2"
                      },
                      {
                        "last_affected": "4.3.17"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5.0.0"
                      },
                      {
                        "fixed": "5.0.15"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.0.14",
            "v5.0.13",
            "v5.0.12",
            "v5.0.10",
            "v5.0.9",
            "v5.0.8",
            "v5.0.7",
            "v5.0.6",
            "v5.0.5",
            "v5.0.4",
            "v34",
            "v5.0.3",
            "v5.0.2",
            "v5.0.1",
            "v5.0.0",
            "v4.3.17",
            "v4.3.16",
            "v4.3.15",
            "v4.3.14",
            "v4.3.13",
            "v4.3.12",
            "v4.3.11",
            "v4.3.10",
            "v4.3.9",
            "v4.3.8",
            "v4.3.7",
            "v4.3.6",
            "v4.3.5",
            "v4.3.4",
            "v4.3.3",
            "v4.3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109329.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.330290641Z",
      "provider": "osv",
      "references": [
        "https://github.com/Admidio/admidio/security/advisories/GHSA-ggch-5cpv-rvqx",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109329.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109329",
        "https://www.vulncheck.com/advisories/admidio-4.3.2-through-4.3.17-and-5.0.0-before-5.0.15-cross-organization-access-control-bypass-via-members-assignment-php"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109329.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109329",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505661,
  "published_at": "2026-10-12T16:05:19.232+00:00"
}