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CVE-2026-34728

Estado: AnalizadaAlta (8.1)—

phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', ", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks. This issue has been patched in version 4.1.1.

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.

XSS/CSRF via parámetro sin validación en MediaBrowserController; UI:R y vector web indican T1189 (drive-by). Impacto: eliminación de archivos (T1565.001) y potencial lectura (T1005) por path traversal.

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

User TrainingRestrict Web-Based ContentRestrict File and Directory PermissionsRemote Data StorageEncrypt Sensitive InformationApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Phpmyfaq — Phpmyfaq

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-34728",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34728",
          "role": "CISA Coordinator",
          "options": [
            {
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            },
            {
              "automatable": "no"
            },
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            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-02T15:23:57.595966Z"
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  "published": "2026-04-02T15:16:41.770",
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      "description": [
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  ],
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    {
      "lang": "en",
      "value": "phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', \", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks. This issue has been patched in version 4.1.1."
    }
  ],
  "lastModified": "2026-06-17T10:39:31.273",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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