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CVE-2026-21624

Estado: AnalizadaCrítica (9.4)—

Lack of input filterung leads to a persistent XSS vulnerability in the user avatar text handling of the Easy Discuss component for Joomla.

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.

CWE-79 (XSS persistente) en componente web Joomla sin filtrado de entrada en avatares. Usuario autenticado (PR:L) con interacción (UI:P) ejecuta JavaScript en navegadores de otros usuarios, potenciando robo de sesiones o 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

Restrict Web-Based ContentDisable or Remove Feature or ProgramUser TrainingUser Account ManagementRestrict File and Directory PermissionsPrivileged Account Management

Tecnologías afectadas (1)

Stackideas — Easydiscuss

CWE

Referencias

JSON original (NVD)

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          "role": "CISA Coordinator",
          "options": [
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              "technicalImpact": "total"
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          "version": "2.0.3",
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          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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          "value": "CWE-79"
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  ],
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      "lang": "en",
      "value": "Lack of input filterung leads to a persistent XSS vulnerability in the user avatar text handling of the Easy Discuss component for Joomla."
    },
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      "lang": "es",
      "value": "Falta de filtrado de entrada conduce a una vulnerabilidad XSS persistente en el manejo del texto del avatar del usuario del componente Easy Discuss para Joomla."
    }
  ],
  "lastModified": "2026-06-17T10:18:49.660",
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