CVE-2026-43880

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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 up to and including 29.0, objects/sendEmail.json.php exposes two branches depending on whether contactForm=1 is submitted. When the parameter is omitted, the endpoint sets $sendTo to an attacker-supplied email and, for unauthenticated callers, uses the site's own contact email as the message From:/Reply-To:. The endpoint is explicitly allow-listed as a \"public write action\" in objects/functionsSecurity.php (line 885), so it requires no authentication or CSRF token. An unauthenticated attacker (solving a captcha) can force the site's own SMTP infrastructure to send attacker-composed emails to arbitrary recipients with the site's legitimate sender address, passing SPF/DKIM/DMARC for the site's domain \u2014 ideal for targeted phishing and brand impersonation. Commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contains an updated fix."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones hasta la 29.0 inclusive, objects/sendEmail.json.php expone dos ramas dependiendo de si se env\u00eda contactForm=1. Cuando se omite el par\u00e1metro, el endpoint establece $sendTo a un correo electr\u00f3nico proporcionado por el atacante y, para los llamantes no autenticados, utiliza el propio correo electr\u00f3nico de contacto del sitio como From:/Reply-To: del mensaje. El endpoint est\u00e1 expl\u00edcitamente en la lista de permitidos como una \u2019acci\u00f3n de escritura p\u00fablica\u2019 en objects/functionsSecurity.php (l\u00ednea 885), por lo que no requiere autenticaci\u00f3n ni token CSRF. Un atacante no autenticado (resolviendo un captcha) puede forzar la propia infraestructura SMTP del sitio a enviar correos electr\u00f3nicos compuestos por el atacante a destinatarios arbitrarios con la direcci\u00f3n de remitente leg\u00edtima del sitio, pasando SPF/DKIM/DMARC para el dominio del sitio - ideal para phishing dirigido e suplantaci\u00f3n de marca. El commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contiene una correcci\u00f3n actualizada."}], "id": "CVE-2026-43880", "lastModified": "2026-10-26T18:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43880", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-12T12:55:28.626058Z", "version": "2.0.3"}}]}, "published": "2026-05-11T22:22:12.530", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/commit/4e3709895857a5857f0edb46b0ee984de0d9e1a2"}, {"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-5hgj-7gm9-cff5"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-5hgj-7gm9-cff5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-940"}], "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": "2026-05-11T23:15:08.815534+00:00", "updated": "2026-05-11T23:30:02.958741+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}