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CVE-2021-4403

Estado: ModificadaMedia (4.3)—

The Remove Schema plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.5. This is due to missing or incorrect nonce validation on the validate() function. This makes it possible for unauthenticated attackers to modify the plugins settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-4403",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-4403",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2024-10-25T13:05:29.712016Z"
        }
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    "cvssMetricV31": [
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        "cvssData": {
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
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  "affected": [
    {
      "source": "security@wordfence.com",
      "affectedData": [
        {
          "vendor": "timvaniersel",
          "product": "Remove Schema",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
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  "published": "2023-07-01T06:15:10.210",
  "references": [
    {
      "url": "https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/",
      "tags": [
        "Not Applicable"
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      "source": "security@wordfence.com"
    },
    {
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        "Not Applicable"
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    {
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      "tags": [
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      "tags": [
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      "url": "https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/",
      "tags": [
        "Not Applicable"
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    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2548575%40remove-schema&new=2548575%40remove-schema&sfp_email=&sfph_mail=",
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        "Not Applicable"
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      "url": "https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/",
      "tags": [
        "Not Applicable"
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    {
      "url": "https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/",
      "tags": [
        "Not Applicable"
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        "Not Applicable"
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        "Not Applicable"
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    {
      "url": "https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/",
      "tags": [
        "Not Applicable"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2548575%40remove-schema&new=2548575%40remove-schema&sfp_email=&sfph_mail=",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/89635463-966d-4f7d-995d-ad83a502d95b?source=cve",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@wordfence.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Remove Schema plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.5. This is due to missing or incorrect nonce validation on the validate() function. This makes it possible for unauthenticated attackers to modify the plugins settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link."
    },
    {
      "lang": "es",
      "value": "El plugin Remove Schema para WordPress es vulnerable a ataques de tipo Cross-Site Request Forgery (CSRF) en versiones hasta la 1.5 inclusive. Esto es debido a la falta o incorrecta validación nonce en la función \"validate()\". Esto hace posible que atacantes no autenticados modifiquen la configuración del plugin a través de una solicitud manipulada concedida y puedan engañar a un administrador del sitio para realizar una acción como hacer clic en un enlace. "
    }
  ],
  "lastModified": "2026-06-17T04:19:41.187",
  "configurations": [
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      "nodes": [
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      ]
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}