{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33543", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-20T18:05:11.832Z", "datePublished": "2026-06-24T21:01:16.544Z", "dateUpdated": "2026-06-24T21:01:16.544Z"}, "containers": {"cna": {"title": "FOSSBilling: Authentication bypass allows unauthenticated administrator creation", "problemTypes": [{"descriptions": [{"cweId": "CWE-288", "lang": "en", "description": "CWE-288: Authentication Bypass Using an Alternate Path or Channel", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-306", "lang": "en", "description": "CWE-306: Missing Authentication for Critical Function", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-28mh-j262-q49w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-28mh-j262-q49w"}, {"name": "https://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0"}], "affected": [{"vendor": "FOSSBilling", "product": "FOSSBilling", "versions": [{"version": "< 0.8.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T21:01:16.544Z"}, "descriptions": [{"lang": "en", "value": "FOSSBilling is a free, open-source billing and client management system. Versions 0.7.2 and prior expose a guest API endpoint, /api/guest/staff/create, intended for initial administrator bootstrap. Due to a flawed admin-existence check, the endpoint remains usable after an administrator already exists. The flawed guard check uses is_countable() on a value that returns a Model_Admin object or null rather than a countable type, causing the expression to always evaluate as true and bypass the intended protection. As a result, an attacker can reach the unprotected endpoint to create a new administrator account and immediately authenticate, gaining a fully privileged admin session even when an admin already exists. This issue has been fixed in version 0.8.0."}], "source": {"advisory": "GHSA-28mh-j262-q49w", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"created": "2026-06-24T22:45:15.368491+00:00", "updated": "2026-06-25T01:00:04.332899+00:00", "vendors": []}