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FKIE_CVE-2026-81891

Vulnerability from fkie_nvd - Published: 2026-08-31 21:17 - Updated: 2026-09-01 15:17
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70.
References
security-advisories@github.comhttps://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff
security-advisories@github.comhttps://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365
security-advisories@github.comhttps://github.com/Studio-42/elFinder/releases/tag/2.1.70
security-advisories@github.comhttps://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "elFinder",
          "vendor": "Studio-42",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.1.70"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70."
    }
  ],
  "id": "CVE-2026-81891",
  "lastModified": "2026-09-01T15:17:31.237",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-81891",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T14:16:58.011463Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-31T21:17:52.757",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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