FOSSBilling: Unverified clients can access client-area pages when email confirmation is required

{
  "id": "8e8d35110239906f67db669f9f4d359e193d998f9fb21770bb69f20658101632",
  "url": "https://osv.dev/vulnerability/CVE-2026-53642",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FOSSBilling: Unverified clients can access client-area pages when email confirmation is required",
    "summary": "FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when the \"Require Email Confirmation\" setting is enabled, a logged-in client with an unverified email address (`email_approved = 0`) can access all client-area pages (e.g. `/client/balance`, `/client/order/list`, `/client/invoice`) and read real account data, including wallet balances and transaction history. The API-side enforcement correctly restricts unverified clients to only profile-related endpoints, but the page-side enforcement is overly permissive, allowing any request whose path starts with `/client`. Version 0.8.0 contains a fix. No known workarounds that don't involve modifying the source code are available.",
    "evidence": "osv:CVE-2026-53642",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-53642",
      "aliases": [
        "CVE-2026-53642",
        "GHSA-7v47-rh46-w923"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/fossbilling/fossbilling",
              "type": "GIT",
              "events": [
                {
                  "introduced": "54743baa65ddfc6ea473ece7e4e860e977c31393"
                },
                {
                  "fixed": "3bd35f5b2921d8a26a403142ae0408f95e6463cc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.5.6"
                      },
                      {
                        "fixed": "0.8.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0.5.6"
                      },
                      {
                        "last_affected": "0.7.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53642.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.901839032Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53642.json",
        "https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-7v47-rh46-w923",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53642"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53642.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53642",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510929,
  "published_at": "2026-07-06T22:45:51.137+00:00"
}