CVE-2026-47733

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{"affected": [{"affectedData": [{"product": "Rocket.Chat", "vendor": "RocketChat", "versions": [{"status": "affected", "version": "< 8.5.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, the ImageElement component in packages/gazzodown renders user-controlled src values directly into <a href> and <img src> attributes without protocol sanitization. Unlike the analogous LinkSpan component \u2014 which uses sanitizeUrl to block javascript:, data:, and vbscript: protocols \u2014 ImageElement passes the raw URL through unchanged. An authenticated user can post a markdown image with a javascript: URL that, if clicked on an older browser, would execute arbitrary JavaScript in the viewer's session. This vulnerability is fixed in 8.5.0."}, {"lang": "es", "value": "Rocket.Chat es una plataforma de comunicaciones de c\u00f3digo abierto, segura y totalmente personalizable. Antes de 8.5.0, el componente ImageElement en packages/gazzodown renderiza valores src controlados por el usuario directamente en los atributos <a href> y <img src> sin sanitizaci\u00f3n de protocolo. A diferencia del componente an\u00e1logo LinkSpan - que utiliza sanitizeUrl para bloquear los protocolos javascript_disabled: , data: y vbscript: - ImageElement pasa la URL sin procesar sin cambios. Un usuario autenticado puede publicar una imagen markdown con una URL javascript_disabled: que, si se hace clic en un navegador antiguo, ejecutar\u00eda JavaScript arbitrario en la sesi\u00f3n del espectador. Esta vulnerabilidad est\u00e1 corregida en 8.5.0."}], "id": "CVE-2026-47733", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47733", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-25T14:46:27.021719Z", "version": "2.0.3"}}]}, "published": "2026-06-24T21:16:54.477", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-vvrf-fq54-q4pr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-vvrf-fq54-q4pr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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