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CVE-2026-1357

Estado: AplazadaCrítica (9.8)—

The Migration, Backup, Staging – WPvivid Backup & Migration plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Upload in versions up to and including 0.9.123. This is due to improper error handling in the RSA decryption process combined with a lack of path sanitization when writing uploaded files. When the plugin fails to decrypt a session key using openssl_private_decrypt(), it does not terminate execution and instead passes the boolean false value to the phpseclib library's AES cipher initialization.

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The library treats this false value as a string of null bytes, allowing an attacker to encrypt a malicious payload using a predictable null-byte key. Additionally, the plugin accepts filenames from the decrypted payload without sanitization, enabling directory traversal to escape the protected backup directory. This makes it possible for unauthenticated attackers to upload arbitrary PHP files to publicly accessible directories and achieve Remote Code Execution via the wpvivid_action=send_to_site parameter.

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.

Vector CVSS AV:N/PR:N/UI:N indica explotación remota sin autenticación (T1190). Carga de archivo PHP sin sanitización en directorio público permite web shell (T1505.003) y ejecución de código (T1059).

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

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningUser Account ManagementRestrict Web-Based ContentNetwork Segmentation

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Wpvivid — Wpvivid Backup MigrationAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-1357",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-1357",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-11T15:45:37.402512Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@wordfence.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@wordfence.com",
      "affectedData": [
        {
          "vendor": "wpvividplugins",
          "product": "WPvivid — Backup, Migration & Staging",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "0.9.123"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-02-11T06:15:51.677",
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.122/includes/class-wpvivid-crypt.php#L58",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.122/includes/customclass/class-wpvivid-send-to-site.php#L629",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.123/includes/class-wpvivid-crypt.php#L58",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.123/includes/customclass/class-wpvivid-send-to-site.php#L629",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/trunk/includes/class-wpvivid-crypt.php#L58",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/trunk/includes/customclass/class-wpvivid-send-to-site.php#L629",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset/3448386/wpvivid-backuprestore#file1",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e5af0317-ef46-4744-9752-74ce228b5f37?source=cve",
      "source": "security@wordfence.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@wordfence.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Migration, Backup, Staging – WPvivid Backup & Migration plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Upload in versions up to and including 0.9.123. This is due to improper error handling in the RSA decryption process combined with a lack of path sanitization when writing uploaded files. When the plugin fails to decrypt a session key using openssl_private_decrypt(), it does not terminate execution and instead passes the boolean false value to the phpseclib library's AES cipher initialization. The library treats this false value as a string of null bytes, allowing an attacker to encrypt a malicious payload using a predictable null-byte key. Additionally, the plugin accepts filenames from the decrypted payload without sanitization, enabling directory traversal to escape the protected backup directory. This makes it possible for unauthenticated attackers to upload arbitrary PHP files to publicly accessible directories and achieve Remote Code Execution via the wpvivid_action=send_to_site parameter."
    },
    {
      "lang": "es",
      "value": "El plugin Migration, Backup, Staging – WPvivid Backup & Migration para WordPress es vulnerable a la carga arbitraria de archivos no autenticada en versiones hasta la 0.9.123 inclusive. Esto se debe a un manejo inadecuado de errores en el proceso de descifrado RSA combinado con una falta de saneamiento de ruta al escribir archivos cargados. Cuando el plugin no logra descifrar una clave de sesión usando openssl_private_decrypt(), no termina la ejecución y en su lugar pasa el valor booleano falso a la inicialización del cifrado AES de la biblioteca phpseclib. La biblioteca trata este valor falso como una cadena de bytes nulos, permitiendo a un atacante cifrar una carga útil maliciosa usando una clave de byte nulo predecible. Además, el plugin acepta nombres de archivo de la carga útil descifrada sin saneamiento, lo que permite el salto de directorio para escapar del directorio de copia de seguridad protegido. Esto hace posible que atacantes no autenticados carguen archivos PHP arbitrarios a directorios de acceso público y logren la ejecución remota de código a través del parámetro wpvivid_action=send_to_site."
    }
  ],
  "lastModified": "2026-06-17T10:15:39.267",
  "sourceIdentifier": "security@wordfence.com"
}