InvoicePlane: Guest user IDOR in quote approval and rejection

{
  "id": "7f15e2c35e9b7f89575dff3195c393c05ed0e26187c5910a11e43302e97e11c3",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-55561",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "InvoicePlane: Guest user IDOR in quote approval and rejection",
    "summary": "InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The `approve()` and `reject()` methods in the Guest Quotes controller, `application/modules/guest/controllers/Quotes.php`, call `approve_quote_by_id($quote_id)` and `reject_quote_by_id($quote_id)` directly without the `where_in('ip_quotes.client_id', $this->user_clients)` scoping that sibling methods use. A guest user assigned to one client can change another client's quote status by supplying sequential integer `quote_id` values, and `email_quote_status()` also sends notification emails. Additionally, `generate_pdf()` calls `mark_viewed($quote_id)` before checking the client scope, allowing a guest user to mark another client's quote as viewed. These issues are fixed in version 1.7.2-beta-1 and the subsequent stable version 1.7.2.",
    "evidence": "cve:CVE-2026-55561",
    "products": [
      {
        "name": {
          "value": "InvoicePlane",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-55561",
      "aliases": [
        "CVE-2026-55561"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 5.3,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "InvoicePlane",
          "product": "InvoicePlane",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.7.2-beta-1"
            }
          ]
        }
      ],
      "modified": "2026-10-28T22:33:47.140Z",
      "provider": "cve",
      "references": [
        "https://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-6xj3-274m-4mvg",
        "https://github.com/InvoicePlane/InvoicePlane/pull/1413",
        "https://github.com/InvoicePlane/InvoicePlane/pull/1471",
        "https://github.com/InvoicePlane/InvoicePlane/commit/424dc44eb54030b93176bb08cba07ba12d7ae451",
        "https://github.com/InvoicePlane/InvoicePlane/commit/fca7792a24de0a749d881cbbe4af6f58e9545d20",
        "https://github.com/InvoicePlane/InvoicePlane/releases/tag/v1.7.2",
        "https://github.com/InvoicePlane/InvoicePlane/releases/tag/v1.7.2-beta-1"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-28T22:33:47.140Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-55561",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 501196,
  "published_at": "2026-10-28T22:33:47.14+00:00"
}