FKIE_CVE-2026-47733
Vulnerability from fkie_nvd - Published: 2026-06-24 21:16 - Updated: 2026-10-25 22:10| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "Rocket.Chat",
"vendor": "RocketChat",
"versions": [
{
"status": "affected",
"version": "\u003c 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 \u003ca href\u003e and \u003cimg src\u003e 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\u0027s 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 \u003ca href\u003e y \u003cimg src\u003e 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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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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