CVE-2021-44076
Estado: ModificadaMedia (4.8)—
An issue was discovered in CrushFTP 9. The creation of a new user through the /WebInterface/UserManager/ interface allows an attacker, with access to the administration panel, to perform Stored Cross-Site Scripting (XSS). The payload can be executed in multiple scenarios, for example when the user's page appears in the Most Visited section of the page.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- Puntuación base: 4.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.68%
- Percentil entre todas las CVEs puntuadas: 51
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-79
Referencias
JSON original (NVD)
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{
"id": "CVE-2021-44076",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 4.8,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "HIGH",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 1.7
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"affected": [
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"affectedData": [
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],
"published": "2022-09-15T13:15:09.593",
"references": [
{
"url": "https://labs.nettitude.com/blog/cve-2021-44076-cross-site-scripting-xss-in-crushftp/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.crushftp.com/",
"tags": [
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"source": "cve@mitre.org"
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{
"url": "https://labs.nettitude.com/blog/cve-2021-44076-cross-site-scripting-xss-in-crushftp/",
"tags": [
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],
"source": "af854a3a-2127-422b-91ae-364da2661108"
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{
"url": "https://www.crushftp.com/",
"tags": [
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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"vulnStatus": "Modified",
"weaknesses": [
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"type": "Primary",
"source": "nvd@nist.gov",
"description": [
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"lang": "en",
"value": "CWE-79"
}
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],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in CrushFTP 9. The creation of a new user through the /WebInterface/UserManager/ interface allows an attacker, with access to the administration panel, to perform Stored Cross-Site Scripting (XSS). The payload can be executed in multiple scenarios, for example when the user's page appears in the Most Visited section of the page."
},
{
"lang": "es",
"value": "Se ha detectado un problema en CrushFTP 9. La creación de un nuevo usuario mediante la interfaz /WebInterface/UserManager/ permite a un atacante, con acceso al panel de administración, llevar a cabo un ataque de tipo Cross-Site Scripting (XSS) Almacenado. La carga útil puede ser ejecutado en múltiples escenarios, por ejemplo cuando la página del usuario aparece en la sección Most Visited de la página"
}
],
"lastModified": "2026-06-17T04:11:52.280",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FD6357D8-DD95-4CE4-88FC-1731FA78D5AF",
"versionEndExcluding": "9.4.0_15",
"versionStartIncluding": "9.0.0"
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"operator": "OR"
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"sourceIdentifier": "cve@mitre.org"
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