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CVE-2021-4458

Estado: AnalizadaCrítica (9.8)—

The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

SQL Injection en parámetro AJAX sin autenticación (AV:N/PR:N/UI:N). Permite exfiltración de datos (CWE-89) y potencial manipulación de información de la base de datos.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Webnus — Modern Events Calendar Lite

CWE

Referencias

JSON original (NVD)

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  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2021-4458",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2025-07-14T14:12:47.341574Z"
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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  "published": "2025-07-12T12:15:25.733",
  "references": [
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      "url": "https://plugins.trac.wordpress.org/changeset/2683727/modern-events-calendar-lite/trunk/app/libraries/render.php",
      "tags": [
        "Patch"
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      "source": "security@wordfence.com"
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      "description": [
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      "value": "The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query.  This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled."
    },
    {
      "lang": "es",
      "value": "El complemento Modern Events Calendar Lite para WordPress es vulnerable a la inyección SQL a través del parámetro 'id' de la acción AJAX 'wp_ajax_mec_load_single_page' en todas las versiones hasta la 6.3.0 incluida, debido a un escape insuficiente del parámetro proporcionado por el usuario y a la falta de preparación de la consulta SQL existente. Esto permite a atacantes no autenticados añadir consultas SQL adicionales a las consultas ya existentes, las cuales pueden utilizarse para extraer información confidencial de la base de datos. Esto solo es explotable en sitios con las barras de herramientas deshabilitadas."
    }
  ],
  "lastModified": "2026-06-17T04:19:48.000",
  "configurations": [
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      "nodes": [
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          "negate": false,
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