Dolibarr 21.0.0 < 24.0.0 Authorization Bypass via clonetasks Mass Action

{
  "id": "a85915d37572a41d099d9307277df21cb5a4dadf5e621c15d18cc797c6debae5",
  "url": "https://osv.dev/vulnerability/CVE-2026-77923",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Dolibarr 21.0.0 < 24.0.0 Authorization Bypass via clonetasks Mass Action",
    "summary": "Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean condition in the private-project membership check within the clonetasks mass action handler in htdocs/core/actions_massactions.inc.php. Authenticated users with project creation permission but without access to a target private project can exploit the flawed !in_array() check to clone tasks into unauthorized private projects.",
    "evidence": "osv:CVE-2026-77923",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-77923",
      "aliases": [
        "CVE-2026-77923"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dolibarr/dolibarr",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fd970b582a4d8c5779a2958a4e9f4fce225cf085"
                },
                {
                  "fixed": "769c7db907099643558e77d7002c109cfda919e5"
                },
                {
                  "fixed": "1730aa56675b31cfede895fdae55b673d887fb8f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:dolibarr:dolibarr_erp\\/crm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "21.0.0"
                      },
                      {
                        "fixed": "24.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1730aa56675b31cfede895fdae55b673d887fb8f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "769c7db907099643558e77d7002c109cfda919e5"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "24.0.0"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77923.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.673743010Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77923.json",
        "https://github.com/Dolibarr/dolibarr/releases/tag/24.0.0",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-77923",
        "https://www.vulncheck.com/advisories/dolibarr-authorization-bypass-via-clonetasks-mass-action",
        "https://github.com/Dolibarr/dolibarr/commit/1730aa56675b31cfede895fdae55b673d887fb8f",
        "https://github.com/Dolibarr/dolibarr"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77923.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-77923",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505123,
  "published_at": "2026-08-24T19:23:28.16+00:00"
}