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CVE-2021-32800

Estado: ModificadaAlta (8.1)—

Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. Thus knowledge of a password, or access to a WebAuthN trusted device of a user was sufficient to gain access to an account. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. There are no workaround for this vulnerability.

CVSS

Probabilidad de explotación (EPSS)

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)

Nextcloud — Nextcloud Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-32800",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
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          "confidentialityImpact": "HIGH"
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  "published": "2021-09-07T22:15:08.417",
  "references": [
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      "tags": [
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      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
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          "value": "CWE-306"
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      "type": "Primary",
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      "description": [
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          "lang": "en",
          "value": "CWE-306"
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  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. Thus knowledge of a password, or access to a WebAuthN trusted device of a user was sufficient to gain access to an account. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. There are no workaround for this vulnerability."
    },
    {
      "lang": "es",
      "value": "El servidor Nextcloud es una nube personal de código abierto y autoalojada. En las versiones afectadas, un atacante es capaz de omitir la autenticación de dos factores en Nextcloud. Así, el conocimiento de una contraseña, o el acceso a un dispositivo confiable WebAuthN de un usuario era suficiente para conseguir acceso a una cuenta. Es recomendado actualizar el servidor Nextcloud a versión 20.0.12, 21.0.4 o 22.1.0. No se presentan soluciones para esta vulnerabilidad"
    }
  ],
  "lastModified": "2026-06-17T03:53:39.223",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}