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CVE-2026-25892

Estado: AnalizadaAlta (7.5)—

Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.

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.

Vulnerabilidad en endpoint web sin autenticación (PR:N, UI:N, AV:N) que causa DoS mediante crash de PHP; POST a ?script=version sin validación permite causar error 500 a todos los usuarios.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Adminer — Adminer

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-25892",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-25892",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-10T15:39:30.588522Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "security-advisories@github.com",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
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          "product": "adminer",
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  "published": "2026-02-09T22:16:04.023",
  "references": [
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  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-20"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2."
    },
    {
      "lang": "es",
      "value": "Adminer es un software de gestión de bases de datos de código abierto. Adminer v5.4.1 y anteriores tiene un mecanismo de verificación de versión donde adminer.org envía información de versión firmada a través de JavaScript postMessage, que el navegador luego envía por POST a ?script=version. Este endpoint carece de validación de origen y acepta datos POST de cualquier fuente. Un atacante puede enviar por POST el parámetro version[] que PHP convierte en un array. En la siguiente carga de página, openssl_verify() recibe este array en lugar de una cadena y lanza TypeError, devolviendo HTTP 500 a todos los usuarios. Actualice a Adminer 5.4.2."
    }
  ],
  "lastModified": "2026-06-17T10:25:23.490",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*",
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              "matchCriteriaId": "0A0A483B-178F-44CC-9EB7-C469C1F8C106",
              "versionEndExcluding": "5.4.2",
              "versionStartIncluding": "4.6.2"
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          "operator": "OR"
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  "sourceIdentifier": "security-advisories@github.com"
}