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CVE-2026-7635

Estado: AplazadaAlta (8.1)—

The coreActivity: Activity Logging for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.0. This is due to the plugin failing to validate or strip PHP serialization syntax from the User-Agent HTTP header before storing it in the logmeta table, and subsequently calling `maybe_unserialize()` on every retrieved `meta_value` in `query_metas()` without verifying the data was originally serialized by the application.

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This makes it possible for unauthenticated attackers to inject a crafted PHP serialized payload via the User-Agent header during any logged event (such as a failed login attempt), which, when an administrator views the Logs page, is deserialized and passed to `DeviceDetector::setUserAgent()`, triggering a Fatal TypeError that creates a persistent Denial of Service condition blocking administrator access to the Logs page entirely.

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.

Acceso red sin autenticación (AV:N, PR:N) a aplicación expuesta. PHP Object Injection → DoS persistente al deserializar en admin; código PHP inyectado pero impacto principal es bloqueo de acceso (Denial of Service).

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 ManagementFilter Network TrafficVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software Installation

Tecnologías afectadas (1)

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

Dev4press — CoreactivityAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-7635",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-7635",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-05-13T10:08:41.178256Z"
        }
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    "cvssMetricV31": [
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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          "versions": [
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              "version": "0",
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  "published": "2026-05-13T05:16:24.737",
  "references": [
    {
      "url": "https://github.com/dev4press/coreactivity/pull/3/changes/1f09331d66de7cf4bba9b6e396b0d4e7597fcde2",
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/table/Logs.php#L161",
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268",
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290",
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Core.php#L252",
      "source": "security@wordfence.com"
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Device.php#L35",
      "source": "security@wordfence.com"
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    {
      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/table/Logs.php#L161",
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      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290",
      "source": "security@wordfence.com"
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      "source": "security@wordfence.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@wordfence.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The coreActivity: Activity Logging for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.0. This is due to the plugin failing to validate or strip PHP serialization syntax from the User-Agent HTTP header before storing it in the logmeta table, and subsequently calling `maybe_unserialize()` on every retrieved `meta_value` in `query_metas()` without verifying the data was originally serialized by the application. This makes it possible for unauthenticated attackers to inject a crafted PHP serialized payload via the User-Agent header during any logged event (such as a failed login attempt), which, when an administrator views the Logs page, is deserialized and passed to `DeviceDetector::setUserAgent()`, triggering a Fatal TypeError that creates a persistent Denial of Service condition blocking administrator access to the Logs page entirely."
    }
  ],
  "lastModified": "2026-06-17T11:02:42.980",
  "sourceIdentifier": "security@wordfence.com"
}