CWE-639

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          "value": "Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Google::oauth` at `application/controllers/Google.php:278` stores its URL-supplied `provider_id` in the session, and `oauth_callback` saves the issued Google OAuth token against that row without checking the caller owns the provider. Any logged-in backend user (admin, provider, or secretary) rebinds a peer provider\u0027s Google sync to a Google account they control. The peer\u0027s appointments then sync into the attacker\u0027s calendar with each customer\u0027s name and email attached as attendee data. Version 1.6.0 patches the issue."
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          "value": "Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the `appointments/search` response, proving that provider isolation is an intended security boundary. However, the direct mutation endpoints `appointments/store` and `appointments/update` only check generic appointment privileges and never verify that the submitted `id_users_provider` belongs to the current session. A normal authenticated provider can inject new appointments into another provider\u0027s schedule via `store`, or reassign existing appointments into a foreign provider\u0027s calendar via `update`. The `store` path contains an additional write-before-crash bug: the unauthorized row is committed to the database before the controller crashes on a type error, so the attacker receives an error response while the foreign appointment is already persisted. Version 1.6.0 patches the issue."
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "openproject",
          "vendor": "opf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 17.3.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 17.4.0, \u003c 17.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through /projects/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e via PATCH parameter \"storages_project_storage[project_folder_id]\" leads to Access to Unauthorized Resources. A project-admin in one project can hijack the managed Nextcloud or OneDrive folder of another project on the same storage by writing the victim project\u0027s project_folder_id into the attacker\u0027s Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project\u0027s user list. This vulnerability is fixed in 17.3.3 and 17.4.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T18:59:27.758Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/opf/openproject/security/advisories/GHSA-3vpx-94qx-xpw6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/opf/openproject/security/advisories/GHSA-3vpx-94qx-xpw6"
        }
      ],
      "source": {
        "advisory": "GHSA-3vpx-94qx-xpw6",
        "discovery": "UNKNOWN"
      },
      "title": "OpenProject: IDOR through /projects/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e via PATCH parameter \"storages_project_storage[project_folder_id]\" leads to Access to Unauthorized Resources"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-52782",
    "datePublished": "2026-06-26T18:59:27.758Z",
    "dateReserved": "2026-06-08T17:13:43.065Z",
    "dateUpdated": "2026-06-29T12:05:20.976Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}