CVE-2026-33731

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{"affected": [{"affectedData": [{"product": "AVideo", "vendor": "WWBN", "versions": [{"status": "affected", "version": "< 29.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions prior to 29.0, the Authorize.Net webhook handler at plugin/AuthorizeNet/webhook.php contains a signature verification bypass that allows an attacker to forge webhook requests with arbitrary payment amounts and target user IDs. By supplying a valid transaction ID from a small legitimate purchase, the attacker bypasses signature validation and credits arbitrary wallet balances to any user account via attacker-controlled payload fields. Three flaws combine into an exploit chain: signature bypass via OR logic (webhook.php:33), payload values override API-fetched values (AuthorizeNet.php:169-171, webhook.php:44-48) and a missing approval check (webhook.php:61-75). By forging payment metadata, an attacker can credit arbitrary amounts to any user's wallet without a corresponding payment and include a \u00a0plans_id\u00a0 to activate premium subscriptions (webhook.php:86-134), enabling free access to all paid and premium content and causing direct revenue loss to the platform owner. This issue has been fixed in version 29.0."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones anteriores a la 29.0, el gestor de webhooks de Authorize.Net en plugin/AuthorizeNet/webhook.php contiene una omisi\u00f3n de verificaci\u00f3n de firma que permite a un atacante falsificar solicitudes de webhook con cantidades de pago arbitrarias e IDs de usuario objetivo. Al proporcionar un ID de transacci\u00f3n v\u00e1lido de una peque\u00f1a compra leg\u00edtima, el atacante omite la validaci\u00f3n de firma y acredita saldos de monedero arbitrarios a cualquier cuenta de usuario a trav\u00e9s de campos de carga \u00fatil controlados por el atacante. Tres fallos se combinan en una cadena de exploit: omisi\u00f3n de firma a trav\u00e9s de l\u00f3gica OR (webhook.php:33), los valores de la carga \u00fatil anulan los valores obtenidos por la API (AuthorizeNet.php:169-171, webhook.php:44-48) y una verificaci\u00f3n de aprobaci\u00f3n faltante (webhook.php:61-75). Al falsificar metadatos de pago, un atacante puede acreditar cantidades arbitrarias al monedero de cualquier usuario sin un pago correspondiente e incluir un plans_id para activar suscripciones premium (webhook.php:86-134), lo que permite el acceso gratuito a todo el contenido de pago y premium y causando una p\u00e9rdida directa de ingresos al propietario de la plataforma. Este problema ha sido solucionado en la versi\u00f3n 29.0."}], "id": "CVE-2026-33731", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33731", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-17T11:11:59.098349Z", "version": "2.0.3"}}]}, "published": "2026-07-16T21:17:20.317", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/commit/033e83ae904cacb99495dbea7cbcfb3738cf42e4"}, {"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-95jh-7r58-xmxw"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-95jh-7r58-xmxw"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,29.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AVideo", "source": "cna", "vendor": "WWBN"}, "product": "avideo", "vendor": "wwbn"}], "created": "2026-07-16T22:45:06.775434+00:00", "updated": "2026-07-31T01:30:05.613714+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}