FKIE_CVE-2026-83526

Vulnerability from fkie_nvd - Published: 2026-10-10 06:16 - Updated: 2026-10-10 06:16
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 8.1.7 via the check_mimetype function. This is due to insufficient file type validation in check_mimetype(), which writes attacker-supplied remote file content to the public uploads directory before any MIME or extension check, combined with a missing capability check on new player creation. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. This requires successfully exploiting a race condition.
References
security@wordfence.comhttps://github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php#L36
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php#L1211
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L105
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L148
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L181
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1102
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1173
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L46
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d741e40d4?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "FV Player 8",
          "vendor": "foliovision",
          "versions": [
            {
              "lessThanOrEqual": "8.1.7",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 8.1.7 via the check_mimetype function. This is due to insufficient file type validation in check_mimetype(), which writes attacker-supplied remote file content to the public uploads directory before any MIME or extension check, combined with a missing capability check on new player creation. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. This requires successfully exploiting a race condition."
    }
  ],
  "id": "CVE-2026-83526",
  "lastModified": "2026-10-10T06:16:43.340",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-10-10T06:16:43.340",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php#L36"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php#L1211"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L105"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L148"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L181"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1102"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1173"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L46"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d741e40d4?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}



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