CWE-646

Reliance on File Name or Extension of Externally-Supplied File

The product allows a file to be uploaded, but it relies on the file name or extension of the file to determine the appropriate behaviors. This could be used by attackers to cause the file to be misclassified and processed in a dangerous fashion.

CVE-2021-34639 (GCVE-0-2021-34639)

Vulnerability from cvelistv5 – Published: 2021-08-05 20:18 – Updated: 2024-08-04 00:19
VLAI?
Summary
Authenticated File Upload in WordPress Download Manager <= 3.1.24 allows authenticated (Author+) users to upload files with a double extension, e.g. "payload.php.png" which is executable in some configurations. This issue affects: WordPress Download Manager version 3.1.24 and prior versions.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
References
Impacted products
Vendor Product Version
W3 Eden, Inc. WordPress Download Manager Affected: 3.1.24 , ≤ 3.1.24 (custom)
Create a notification for this product.
Credits
Ramuel Gall, Wordfence
Show details on NVD website

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CVE-2023-45599 (GCVE-0-2023-45599)

Vulnerability from cvelistv5 – Published: 2024-03-05 11:34 – Updated: 2024-08-02 20:21
VLAI?
Summary
A CWE-646 “Reliance on File Name or Extension of Externally-Supplied File” vulnerability in the “iec61850” functionality of the web application allows a remote authenticated attacker to upload any arbitrary type of file into the device. This issue affects: AiLux imx6 bundle below version imx6_1.0.7-2.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
AiLux imx6 bundle Affected: 0 , < 1.0.7-2 (semver)
Create a notification for this product.
Credits
Andrea Palanca of Nozomi Networks found this bug during a security research activity.
Show details on NVD website

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CVE-2024-38432 (GCVE-0-2024-38432)

Vulnerability from cvelistv5 – Published: 2024-07-30 08:50 – Updated: 2024-08-02 04:12
VLAI?
Summary
Matrix Tafnit v8 - CWE-646: Reliance on File Name or Extension of Externally-Supplied File
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
Matrix Tafnit v8 Affected: All versions , < 8.4.202 (custom)
Create a notification for this product.
Credits
Gad Abuhatziera, Nimrod Bickels, Itay Cherdman - Sophtix Security LTD
Show details on NVD website

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CVE-2024-52052 (GCVE-0-2024-52052)

Vulnerability from cvelistv5 – Published: 2024-11-21 22:20 – Updated: 2024-11-22 16:11
VLAI?
Summary
Wowza Streaming Engine below 4.9.1 permits an authenticated Streaming Engine Manager administrator to define a custom application property and poison a stream target for high-privilege remote code execution.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
Wowza Streaming Engine Affected: 4.3.0 , < 4.9.1 (cpe)
Create a notification for this product.
Show details on NVD website

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CVE-2025-1889 (GCVE-0-2025-1889)

Vulnerability from cvelistv5 – Published: 2025-03-03 18:38 – Updated: 2025-03-04 11:43
VLAI?
Summary
picklescan before 0.0.22 only considers standard pickle file extensions in the scope for its vulnerability scan. An attacker could craft a malicious model that uses Pickle and include a malicious pickle file with a non-standard file extension. Because the malicious pickle file inclusion is not considered as part of the scope of picklescan, the file would pass security checks and appear to be safe, when it could instead prove to be problematic.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
mmaitre314 picklescan Affected: 0.0.1 , ≤ 0.0.21 (semver)
Create a notification for this product.
Credits
Trevor Madge (@madgetr) of Sonatype
Show details on NVD website

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CVE-2025-30662 (GCVE-0-2025-30662)

Vulnerability from cvelistv5 – Published: 2025-11-13 14:53 – Updated: 2025-11-14 04:55
VLAI?
Summary
Symlink following in the installer for the Zoom Workplace VDI Plugin macOS Universal installer before version 6.3.14, 6.4.14, and 6.5.10 in their respective tracks may allow an authenticated user to conduct a disclosure of information via network access.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Show details on NVD website

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CVE-2025-41720 (GCVE-0-2025-41720)

Vulnerability from cvelistv5 – Published: 2025-10-22 06:52 – Updated: 2025-10-22 15:48
VLAI?
Summary
A low privileged remote attacker can upload arbitrary data masked as a png file to the affected device using the webserver API because only the file extension is verified.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
Sauter modulo 6 devices modu680-AS Affected: 0.0.0 , < Firmware v3.2.0 (semver)
Create a notification for this product.
    Sauter modulo 6 devices modu660-AS Affected: 0.0.0 , < Firmware v3.2.0 (semver)
Create a notification for this product.
    Sauter modulo 6 devices modu612-LC Affected: 0.0.0 , < Firmware v3.2.0 (semver)
Create a notification for this product.
    Sauter EY-modulo 5 modu 5 modu524 Affected: 0.0 , < Firmware v6.0 (semver)
Create a notification for this product.
    Sauter EY-modulo 5 modu 5 modu525 Affected: 0.0 , < Firmware v6.0 (semver)
Create a notification for this product.
    Sauter EY-modulo 5 ecos 5 ecos504/505 Affected: 0.0 , < Firmware v6.0 (semver)
Create a notification for this product.
Credits
Damian Pfammatter, Daniel Hulliger from Cyber-Defence Campus armasuisse
Show details on NVD website

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CVE-2025-58449 (GCVE-0-2025-58449)

Vulnerability from cvelistv5 – Published: 2025-09-08 21:27 – Updated: 2025-09-09 13:30
VLAI?
Summary
Maho is a free and open source ecommerce platform. In Maho prior to 25.9.0, an authenticated staff user with access to the `Dashboard` and `Catalog\Manage Products` permissions can create a custom option on a listing with a file input field. By allowing file uploads with a `.php` extension, the user can use the filed to upload malicious PHP files, gaining remote code execution. Version 25.9.0 fixes the issue.
CWE
  • CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
Assigner
Impacted products
Vendor Product Version
MahoCommerce maho Affected: < 25.9.0
Create a notification for this product.
Show details on NVD website

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            {
              "cweId": "CWE-646",
              "description": "CWE-646: Reliance on File Name or Extension of Externally-Supplied File",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-08T21:27:55.103Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/MahoCommerce/maho/security/advisories/GHSA-vgmm-27fc-vmgp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/MahoCommerce/maho/security/advisories/GHSA-vgmm-27fc-vmgp"
        },
        {
          "name": "https://github.com/MahoCommerce/maho/commit/db54a1b44e9b3fd26b27ca4d5ece0af99c4dcb53",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/MahoCommerce/maho/commit/db54a1b44e9b3fd26b27ca4d5ece0af99c4dcb53"
        }
      ],
      "source": {
        "advisory": "GHSA-vgmm-27fc-vmgp",
        "discovery": "UNKNOWN"
      },
      "title": "Maho Vulnerable to Authenticated Remote Code Execution via File Upload"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-58449",
    "datePublished": "2025-09-08T21:27:55.103Z",
    "dateReserved": "2025-09-01T20:03:06.533Z",
    "dateUpdated": "2025-09-09T13:30:56.695Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}



Mitigation

Phase: Architecture and Design

Description:

  • Make decisions on the server side based on file content and not on file name or extension.
CAPEC-209: XSS Using MIME Type Mismatch

An adversary creates a file with scripting content but where the specified MIME type of the file is such that scripting is not expected. The adversary tricks the victim into accessing a URL that responds with the script file. Some browsers will detect that the specified MIME type of the file does not match the actual type of its content and will automatically switch to using an interpreter for the real content type. If the browser does not invoke script filters before doing this, the adversary's script may run on the target unsanitized, possibly revealing the victim's cookies or executing arbitrary script in their browser.

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