CWE-434

Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

CVE-2026-32536 (GCVE-0-2026-32536)

Vulnerability from cvelistv5 – Published: 2026-03-25 16:15 – Updated: 2026-04-29 09:52
VLAI
Title
WordPress Green Downloads plugin <= 2.08 - Arbitrary File Upload vulnerability
Summary
Unrestricted Upload of File with Dangerous Type vulnerability in halfdata Green Downloads halfdata-paypal-green-downloads allows Using Malicious Files.This issue affects Green Downloads: from n/a through <= 2.08.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
halfdata Green Downloads Affected: n/a , ≤ <= 2.08 (custom)
Create a notification for this product.
Date Public
2026-03-25 17:12
Credits
Phat RiO | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-32756 (GCVE-0-2026-32756)

Vulnerability from cvelistv5 – Published: 2026-03-19 23:08 – Updated: 2026-03-20 17:07
VLAI
Title
Admidio: Unrestricted File Upload via CSRF Token Validation Bypass in Documents & Files Module
Summary
Admidio is an open-source user management solution. Versions 5.0.6 and below contain a critical unrestricted file upload vulnerability in the Documents & Files module. Due to a design flaw in how CSRF token validation and file extension verification interact within UploadHandlerFile.php, an authenticated user with upload permissions can bypass file extension restrictions by intentionally submitting an invalid CSRF token. This allows the upload of arbitrary file types, including PHP scripts, which may lead to Remote Code Execution on the server, resulting in full server compromise, data exfiltration, and lateral movement. This issue has been fixed in version 5.0.7.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
Admidio admidio Affected: < 5.0.7
Create a notification for this product.
Show details on NVD website

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CVE-2026-32931 (GCVE-0-2026-32931)

Vulnerability from cvelistv5 – Published: 2026-04-10 17:50 – Updated: 2026-04-15 14:56
VLAI
Title
Chamilo LMS has Arbitrary File Upload via MIME-Only Validation in Exercise Sound Upload Leads to RCE
Summary
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, an unrestricted file upload vulnerability in the exercise sound upload function allows an authenticated teacher to upload a PHP webshell by spoofing the Content-Type header to audio/mpeg. The uploaded file retains its original .php extension and is placed in a web-accessible directory, enabling Remote Code Execution as the web server user (www-data). This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
Impacted products
Vendor Product Version
chamilo chamilo-lms Affected: < 1.11.38
Affected: >= 2.0.0-alpha.1, < 2.0.0-RC.3
Create a notification for this product.
Show details on NVD website

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CVE-2026-32985 (GCVE-0-2026-32985)

Vulnerability from cvelistv5 – Published: 2026-03-20 00:06 – Updated: 2026-03-20 17:37
VLAI
Title
Xerte Online Toolkits <= 3.14 Unauthenticated Template Import Arbitrary File Upload Leading to Remote Code Execution
Summary
Xerte Online Toolkits versions 3.14 and earlier contain an unauthenticated arbitrary file upload vulnerability in the template import functionality that allows remote attackers to execute arbitrary code by uploading a crafted ZIP archive containing malicious PHP payloads. Attackers can bypass authentication checks in the import.php file to upload a template archive with PHP code in the media directory, which gets extracted to a web-accessible path where the malicious PHP can be directly accessed and executed under the web server context.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
Xerte Xerte Online Toolkits Affected: 0 , ≤ 3.14 (custom)
Create a notification for this product.
Date Public
2026-02-19 00:00
Credits
indoushka
Show details on NVD website

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CVE-2026-32989 (GCVE-0-2026-32989)

Vulnerability from cvelistv5 – Published: 2026-03-20 15:50 – Updated: 2026-05-13 19:36
VLAI
Title
Precurio Intranet Portal 4.4: Cross-Site Request Forgery leading to arbitrary file upload
Summary
Precurio Intranet Portal 4.4 contains a cross-site request forgery vulnerability that allows attackers to induce authenticated users to submit crafted requests to a profile update endpoint handling file uploads. Attackers can exploit this to upload executable files to web-accessible locations, leading to arbitrary code execution in the context of the web server.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-352 - Cross-Site request forgery (CSRF)
  • CWE-434 - Unrestricted upload of file with dangerous type
Assigner
References
Impacted products
Date Public
2026-02-17 00:00
Credits
indoushka
Show details on NVD website

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CVE-2026-33071 (GCVE-0-2026-33071)

Vulnerability from cvelistv5 – Published: 2026-03-20 08:27 – Updated: 2026-03-20 21:21
VLAI
Title
FileRise: WebDAV upload path bypasses filename validation enforced by regular uploads
Summary
FileRise is a self-hosted web file manager / WebDAV server. In versions prior to 3.8.0, the WebDAV upload endpoint accepts any file extension including .phtml, .php5, .htaccess, and other server-side executable types, bypassing the filename validation enforced by the regular upload path. In non-default deployments lacking Apache's LocationMatch protection, this leads to remote code execution. When files are uploaded via WebDAV, the createFile() method in FileRiseDirectory.php and the put() method in FileRiseFile.php accept the filename directly from the WebDAV client without any validation. In contrast, the regular upload endpoint in UploadModel::upload() validates filenames against REGEX_FILE_NAME. This issue is fixed in version 3.8.0.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-552 - Files or Directories Accessible to External Parties
Assigner
References
Impacted products
Vendor Product Version
error311 FileRise Affected: < 3.8.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-33273 (GCVE-0-2026-33273)

Vulnerability from cvelistv5 – Published: 2026-04-08 05:11 – Updated: 2026-04-08 15:05
VLAI
Summary
Unrestricted upload of file with dangerous type issue exists in MATCHA INVOICE 2.6.6 and earlier. If this vulnerability is exploited, an arbitrary file may be created by an administrator of the product. As a result, arbitrary code may be executed on the server.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted upload of file with dangerous type
Assigner
Impacted products
Vendor Product Version
ICZ Corporation MATCHA INVOICE Affected: 2.6.6 and earlier
Create a notification for this product.
Show details on NVD website

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CVE-2026-33435 (GCVE-0-2026-33435)

Vulnerability from cvelistv5 – Published: 2026-04-15 18:13 – Updated: 2026-04-15 18:40
VLAI
Title
Weblate: Remote code execution during backup restoration
Summary
Weblate is a web based localization tool. In versions prior to 5.17, the project backup didn't filter Git and Mercurial configuration files which could lead to remote code execution under certain circumstances. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can limit the scope of the vulnerability by restricting access to the project backup, as it is only accessible to users who can create projects.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-23 - Relative Path Traversal
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
WeblateOrg weblate Affected: < 5.17
Create a notification for this product.
Show details on NVD website

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CVE-2026-33582 (GCVE-0-2026-33582)

Vulnerability from cvelistv5 – Published: 2026-06-09 07:34 – Updated: 2026-06-09 15:06
VLAI
Title
Apache Answer: Uploading specially crafted TIFF files causes an Out-of-Memory error
Summary
Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. A crafted TIFF image could trigger excessive memory allocation during image decoding, allowing an authenticated user to cause the server process to crash. Users are recommended to upgrade to version 2.0.1, which fixes the issue.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
Impacted products
Vendor Product Version
Apache Software Foundation Apache Answer Affected: 0 , ≤ 2.0.0 (semver)
Create a notification for this product.
Credits
Andy Gill, ZephrSec Ltd
Show details on NVD website

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CVE-2026-33647 (GCVE-0-2026-33647)

Vulnerability from cvelistv5 – Published: 2026-03-23 18:23 – Updated: 2026-03-24 17:36
VLAI
Title
AVideo Vulnerable to Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload
Summary
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `ImageGallery::saveFile()` method validates uploaded file content using `finfo` MIME type detection but derives the saved filename extension from the user-supplied original filename without an allowlist check. An attacker can upload a polyglot file (valid JPEG magic bytes followed by PHP code) with a `.php` extension. The MIME check passes, but the file is saved as an executable `.php` file in a web-accessible directory, achieving Remote Code Execution. Commit 345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae contains a patch.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
Vendor Product Version
WWBN AVideo Affected: <= 26.0
Create a notification for this product.
Show details on NVD website

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Mitigation

Phase: Architecture and Design

Description:

  • Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]
Mitigation ID: MIT-21

Phase: Architecture and Design

Strategy: Enforcement by Conversion

Description:

  • When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation

Phase: Architecture and Design

Description:

  • Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]
Mitigation ID: MIT-5

Phase: Implementation

Strategy: Input Validation

Description:

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
Mitigation

Phase: Architecture and Design

Description:

  • Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.
Mitigation

Phase: Implementation

Strategy: Input Validation

Description:

  • Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]
Mitigation

Phase: Implementation

Description:

  • When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
Mitigation ID: MIT-15

Phase: Architecture and Design

Description:

  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation

Phase: Implementation

Description:

  • Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.
Mitigation

Phase: Implementation

Description:

  • Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.
Mitigation ID: MIT-17

Phases: Architecture and Design, Operation

Strategy: Environment Hardening

Description:

  • Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
Mitigation ID: MIT-22

Phases: Architecture and Design, Operation

Strategy: Sandbox or Jail

Description:

  • Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs

In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.

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